Alesis ADAT-HD24 Reference Manual
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Alesis ADAT-HD24 Reference Manual

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Summary of Contents for Alesis ADAT-HD24

  • Page 2: Table Of Contents

    Welcome! ... 3 About the ADAT HD24... 3 Important features of your ADAT HD24 ... 3 ADAT HD24 key features:... 5 How to Use This Manual... 6 Important Safety Instructions...7 Instructions de Sécurité Importantes (French) ... 8 Beim Benutzen dieses Produktes beachten Sie bitte die folgenden Sicherheitshinweise: (German) ...
  • Page 3 To quit FTP server mode...88 An Example Network ...89 Troubleshooting Index...91 Avoiding ground loop noise ...93 Line Conditioners and Protectors ...93 Care and Maintenance ...94 Cleaning ...94 Refer All Servicing to Alesis ...94 Obtaining Repair Service ...95 Dimensional drawing ...98 ADAT HD24 Reference Manual...

  • Page 4: Welcome

    We believe in our products, because we've heard the results that creative people like you have achieved with them. One of Alesis' goals is to make high-quality studio equipment available to everyone, and this Reference Manual is an important part of that.
  • Page 5 Superb sonic performance was a base-line objective for Alesis. The HD24 provides 24 tracks of high-resolution 24-bit uncompressed linear recording at standard sample rates of 44.1kHz or 48 kHz.

  • Page 6: Adat Hd24 Key Features

    ADAT HD24 key features: 1. 24 Track simultaneous recording at 44.1/48 kHz (12 tracks @ 88.2/96 kHz) 2 . Storage media: Standard IDE hard drive (minimum 5,400 RPM) 3. Recording time per each 10 gigabytes @ 48kHz: 45 minutes x 24 tracks; @ 96kHz: 45 minutes x 12 tracks 4 .

  • Page 7: How To Use This Manual

    Introduction/Safety Instructions How to Use This Manual This manual is divided into the following sections describing the various functions and applications for the ADAT HD24. While it's a good idea to read through the entire manual once carefully, those having general knowledge about studio equipment should use the table of contents to look up specific functions.

  • Page 8: Important Safety Instructions

    Safety symbols used in this product This symbol alerts the user that there are important operating and maintenance instructions in the literature accompanying this unit. This symbol warns the user of uninsulated voltage within the unit that can cause dangerous electric shocks.

  • Page 9: Instructions De Sécurité Importantes (French)

    Introduction/Safety Instructions Instructions de Sécurité Importantes (French) Symboles utilisés dans ce produit Ce s ymbole alèrte l’utilisateur qu’il existe des instructions de fonctionnement et de maintenance dans la documentation jointe avec ce produit. Ce symbole avertit l’utilisateur de la présence d’une tension non isolée à l’intérieur de l’appareil pouvant engendrer des chocs électriques.

  • Page 10: Beim Benutzen Dieses Produktes Beachten Sie Bitte Die Folgenden Sicherheitshinweise: (German)

    Beim Benutzen dieses Produktes beachten Sie bitte die folgenden Sicherheitshinweise: (German) Lesen Sie die Hinweise. 2. Halten Sie sich an die Anleitung. 3. Beachten Sie alle Warnungen. 4. Beachten Sie alle Hinweise. 5. Bringen Sie das Gerät nie mit Wasser in Berührung.

  • Page 11: Ce Declaration Of Conformity

    Reorient or relocate the receiving antenna. • • Increase the separation between the equipment and receiver. Alesis Corporation 12509 Beatrice Street Los Angeles, CA 90066 ADAT HD24 Digital audio recording device www.alesis.com Connect the equipment into an outlet on a •...

  • Page 12: Quick Start Guide

    "shorthand" guide for those who want to start using the HD24 right away. The basic hookup and operation of the Alesis ADAT HD24™ is similar to that of previous ADATs in most respects. If you have questions about any of the features, don’t worry –...
  • Page 13 quick start guide • chapter 1 Step 2: Get the drive ready Mount and select the hard drive When you first turn on the power, the HD24 will automatically mount the last drive that was selected in the system. (Mounting means that the system recognizes the disk, has powered it up, and can communicate with it.) If you have two hard drives installed, only one will be mounted.
  • Page 14 Step 3: Try a test recording Now we’re ready to try some basic recording. In this exercise, we’ll simply record some audio into a new song, then play it back to hear the results. First, press the NEW SONG right corner of the unit. The display should look like this: Create New Song? (Press Y /N)

  • Page 15: Front Panel Tour-Left Side

    IDE drive of any size, from almost any manufacturer (see your Alesis dealer for details). Additional drive caddies are available from your Alesis dealer, so you can instantly swap out projects, just as conveniently as tape. Never pull a drive caddy out unless its LED is...

  • Page 16: Front Panel Tour-Right Side

    Front panel tour—right side Editing buttons EDIT START EDIT END buttons define a region of a track (or tracks, as determined by the button) that TRACK EDIT can be selected for editing. Press to remove the region (leaving silence on the track), to copy it without COPY removing it.

  • Page 17: About The Display

    quick start guide • chapter 1 About the Display Time counter shows the current location (from the Song Start point, zero in ABS time) in hours, minutes, seconds, and frames. The alphanumeric display: This does different things, depending on what's going on at the time.

  • Page 18: Rear Panel Tour

    Rear panel tour AC connector This is where a standard IEC detachable power cord plugs POWER switch (hard) Normally, you'll leave this switch on, controlling power from the front panel switch. Always turn off the unit using the front panel POWER switch first.
  • Page 19 quick start guide • chapter 1 ADAT HD24 Reference Manual...

  • Page 20: Connections

    Alesis warranty card ✪ It is important to register your purchase; if you have not already filled out your warranty card and mailed it back to Alesis, please take the time to do so now. Mounting on a Shelf or Non-Rack Enclosure...

  • Page 21: Power

    Do not substitute any other type of AC cord; IEC-spec cables of various lengths may be purchased from electronics stores or your Alesis dealer. The ground connection is an important safety...

  • Page 22: Analog Inputs And Outputs

    Analog inputs and outputs ✪ When connecting audio cables and/or turning power on and off, make sure that all devices in your system are turned off and the volume controls are turned down. Outputs from the HD24 to a mixing console: Balanced outputs The ADAT HD24's 24 analog...

  • Page 23: From The Console To The Hd24'S Inputs

    connections • chapter 2 From the console to the HD24's inputs: What's INPUT NORMALLING? Most affordable analog consoles don't have 24 outputs. Even those with 24 or 32 tape inputs usually have only eight busses or group outputs. Luckily, the HD24 is designed so it can still be used with eight, four, or even two-bus consoles, thanks to a feature called...

  • Page 24: About Audio Cables

    Insert the plugs in the jacks a few times, to clean the internal jack contacts. Although Alesis does not endorse any specific product, certain chemicals, when applied to electrical connectors, are claimed to improve the electrical contact between connectors.

  • Page 25: Sync In/Out

    Up to five HD24s can be linked, making a 120-track system. This requires a male-to-male, 9- pin D connector cable for each additional machine in the chain. Use only Alesis-approved Sync cables, available in various lengths from your dealer. Improper cables (such as those used for computers) correctly.

  • Page 26: Adat Optical Digital Inputs And Outputs

    • workstation with ADAT Optical ports • receive digital signals from many Alesis keyboards and effect devices Digital copying requires three fiber optic cables for each HD24 in the system (or any other ADAT- compatible product).
  • Page 27 connections • chapter 2 To connect the digital inputs and outputs 1. Locate the DIGITAL connectors for Tracks 1-8. Remove the connectors’ plugs (if present) and store for later use. 2. Remove the clear, plastic tube covering each end of the optical cable (if present). Connect one end of the fiber optic cable into the jack of the HD24.
  • Page 28 Copying between ADATs If you combine an ADAT HD24 with several ADATs in a system and aren't using a digital mixer, you may connect them directly so you can copy the HD24 to tape and the tapes to the HD24. To digitally copy between an HD24 and tape-based ADATs, simply connect the HD24 machine to the...
  • Page 29 connections • chapter 2 Connecting to a computer interface card This illustration shows an HD24 connected to an ADAT-compatible computer interface card. The card’s ADAT outputs are connected to the HD24 Digital Inputs and the HD24’s Digital Outputs are connected to the card’s ADAT Inputs. In this particular case the ADAT SYNC is connected so that the card (computer) is the master or controller of the ADAT HD24.

  • Page 30: Footswitches

    Footswitches The HD24 provides two footswitch connectors on its rear panel using 1/4" mono (T/S) jacks. One, labeled , allows locate and play commands when used with a standard footswitch, or more elaborate control when used with the LRC Remote control; the other, labeled , is for punch in/out PUNCH...
  • Page 31 connections • chapter 2 ADAT HD24 Reference Manual...

  • Page 32: Basic Recording And Playback

    Basic Recording and Playback About the hard drives There are no "internal" hard drives in the ADAT- HD24; the drive bays on the front panel house drives up to 2000 GB each which can be removed and/or replaced while the machine is powered up, as long as the LED indicator for the drive OFF.
  • Page 33 basic recording and playback • chapter 3 To select a Song: 1. On power-up, the ADAT HD24 will mount a drive and automatically select the last song you were using. If the display looks something like this: S0 1 :"Song Name " 00:00:00:00 it is already in Song Select mode.
  • Page 34 To name a Song: With up to 64 possible Songs on a drive, it's a good idea to give each one a unique name that will help you find the tracks you need. Names may be up to 10 characters long. It takes only a few seconds. Press the button.

  • Page 35: Making A Recording

    basic recording and playback • chapter 3 Making A Recording Recording on the HD24 is similar to recording on a multitrack tape machine, if you think of each Song being like its own small tape. The process involves selecting a song (see previous tutorial), putting one or more tracks into record-ready, adjusting record levels on your mixer, setting the input monitor mode, locating to the start time and engaging...

  • Page 36: Transport Buttons

    Transport Buttons During recording and playback, the following transport buttons are used frequently. Get familiar with them by using them while watching the TIME counter. LOCATE Sends the HD24 to the currently-selected locate point shown in the lower-right side of the display. Press once to jump back five seconds;...

  • Page 37: Track Selection And Setting Levels

    basic recording and playback • chapter 3 Track Selection and Setting Levels You’ll find the RECORD ENABLE buttons for all twenty-four tracks on the left side of the front panel, beneath the display. A track is considered: • “safe” when its LED is off in “record-ready”...

  • Page 38: The Meters

    The meters Each of the tracks has its own 10-segment LCD meter, with levels ranging from CLIP (0 dBFS) to –60 dB. Levels within 6 dB (1 bit) of clipping are shown in yellow. The standard nominal level for ADAT, -15 dBFS, is two segments below that color change.

  • Page 39: Setting The Recording Level

    basic recording and playback • chapter 3 To change the peak hold mode: button is designed to allow the PEAK MODE user to change the way that signal peaks are displayed in the Level Meter Display. Pressing the button once brings up one of the PEAK MODE following displays (depending upon the current state of the peak metering):...

  • Page 40: Input Select

    Input Select A single button (just below the INPUT SELECT display) selects what source will be recorded: the input. The currently selected ANALOG DIGITAL input source is indicated in the lower left corner of the display. When is set to INPUT SELECT looks to the 1/4”...

  • Page 41: Input Monitor Controls

    basic recording and playback • chapter 3 Input Monitor Controls There are two Input Monitor controls: ALL INPUT Auto Input This feature determines what you will hear from the HD24’s output jacks when a track is record- enabled ( LED flashing): the track, or the input source.

  • Page 42: Playback

    Playback There are several ways to quickly play back your recording. You’ll use the transport buttons first. To play back a recording: Press to locate back to the position you’re looking for, or use one of the Locate keys to go to a particular position.

  • Page 43: Pitch Control

    basic recording and playback • chapter 3 Pitch Control The Pitch function controls the recording speed, and thus the pitch of the audio recorded on disk, whenever the CLOCK SOURCE is set to Internal. The HD24’s Pitch control has a range of -300 to +100 cents when using a sample rate of 48kHz or 96kHz, and a range of -200 to +200 cents when using 44.1kHz or 88.2kHz.

  • Page 44: Using Locate Points

    Locating Up to 24 time positions can be stored in each Song for easy recall. These are called Locate Points, and can be stored either “on the fly” while the transport is engaged, or when the transport is stopped. Each of the 64 Songs has its own unique Locate Points plus its own "zero"...
  • Page 45 using locate points • chapter 4 To store locate points “on the fly”: 1. Press to begin playback. PLAY 2. Tap SET LOCATE. The current time position is transferred into the next Locate Point, shown in the lower right hand side of the display, i.e., if it was showing Locate 03, tapping SET LOCATE will write the current time into Locate 04, overwriting whatever was there.

  • Page 46: Other Locate Commands

    Other Locate Commands Note that several other functions can be affected when you edit Locate Points: Auto Return When this function is on, the HD24 will automatically jump to the Loop Start point whenever the Loop End point is reached. Auto Play When this function is on, the HD24 will begin playback automatically after any Locate button is...
  • Page 47 using locate points • chapter 4 To loop a section of a Song: The following instructions assume you’ll use the default settings for Loop Start and Loop End. 1. Store the position where you want the loop to begin into Locate 1. Refer to the previous section for instructions.

  • Page 48: Automated Recording

    Automated Recording So far, all of your recording has been done manually — you pressed the transport buttons when you wanted to start and stop recording. Auto recording stops and starts recording automatically at predetermined times. useful when you want to precisely punch in to a specific place on one or more tracks, and especially when you need to do it over and over again.

  • Page 49: Rehearsing

    using locate points • chapter 4 ✪ If none of the tracks are in record-ready (all [REC] LEDs off) when Play and Record are pressed, the display will read No Tracks Armed. ✪ If a record is initiated past Locate 21’s position, but before Locate 22’s position, then record is entered immediately.

  • Page 50: Working With Drives

    Mounting and selecting a drive One of the key strengths of the ADAT HD24 is its easily-removable hard drives; in fact it was our goal to make the drive caddies similar to ADAT tapes in their transportability and low cost. Your system becomes much more flexible when you add additional drives.

  • Page 51: How Drives Get Mounted

    working with drives • chapter 5 How Drives Get Mounted When power is turned on and a drive is present, it will be mounted automatically; you don't need to take any action unless a drive was deliberately dismounted. If no drive is present If the ADAT HD24 is powered on with no drives in its bays, the display will (after the startup "splash"...

  • Page 52: Adding Additional Drives

    Adding additional drives You can obtain additional HD24 drive caddies from your Alesis dealer. You may install hard disks in a caddy yourself, or the dealer may have them available with disks installed. In any case, the drive should be set to “master”...
  • Page 53 working with drives • chapter 5 > 4. Press the (CURSOR RIGHT) cursor under “Y/N” in the display. 5. Press the (L ) button to begin formatting the drive. If, upon trying to select a drive for use, the machine determines that a disk's format is invalid, the display will prompt: Invalid Format...
  • Page 54 2. Pull the empty drive caddy from the HD24. Open the top of the caddy by sliding it backwards. Use only Alesis-manufactured drive caddies in the HD24. Removable drive bays from other manufacturers are NOT COMPATIBLE and will damage the HD24.

  • Page 55: Backing Up Your Work

    working with drives • chapter 5 Backing up your work Because the ADAT HD24 has two removable drive bays, you can make a safety copy of your valuable recordings right in the unit, as long as you have two drives. While hard drives can run for thousands of hours without maintenance, and store data without decay for many years, hard drive...

  • Page 56: Editing

    One of the key benefits of recording to a hard disk recorder such as the HD24 is the ability to edit your performance. The HD24 allows you to copy a perfect rhythm guitar part to every chorus, move a bass solo to a later chorus, even undo a bad edit. This section will introduce you to the editing controls on the HD24, then walk you through some common editing techniques.

  • Page 57: Using The Edit Start And Edit End Points

    editing • chapter 6 Using the Edit Start and Edit End Points Setting accurate EDIT START be critical to every edit you make on the HD24. This section will explain how to make the most of these functions. Setting an Edit Start or Edit End Point Edit Start and Edit End points will be used for every type of edit.

  • Page 58: Adjusting The Edit Start And Edit End Points

    Adjusting the Edit Start and Edit End Points Edit Start and Edit End points can be adjusted in two ways: by using the cursor keys or by using the scrub feature. Adjusting Edit Start and Edit End points using the Cursor Keys When the Edit Start or Edit End point is shown in the display, you can edit their location with the cursor buttons.

  • Page 59: Using The Cut And Copy Commands

    editing • chapter 6 Using the Cut and Copy Commands The Cut and Copy commands place the audio between the Edit Start and Edit End points from edit-selected tracks into a buffer. This audio can then be pasted elsewhere in the song. Cutting an Audio Region This procedure cuts the selected tracks between the Edit Start and Edit End points, leaving silence in its...
  • Page 60 Cutting entire tracks Instead of cutting between the Edit Start and Edit End points, it is possible to cut the entire track or tracks selected for editing. 1. Press and hold the TRACK EDIT the Track Record Enable button of the tracks you want to cut.

  • Page 61: Using The Paste Command

    editing • chapter 6 Using the Paste Command The Paste function is used in conjunction with the Cut and Copy functions. This function allows you to use the audio that you’ve cut or copied in another section of the song, another track, or even another song.
  • Page 62 Pasting Audio to a Different Song You can use the command to move audio to a PASTE different song. This is often used to copy tracks from an 8-track song into a 24-track song for more available tracks. You could use this technique to save a copy of a song, so that the original stays untouched;...

  • Page 63: Undo

    editing • chapter 6 Undo The undo command reverses the effects of previous edit commands. Multiple levels of undo are available (with certain restrictions on size). For example, if you don’t like the results of a command, you can press recording to its pre-paste state.

  • Page 64: Track Slip

    Using the Undo command First, perform a Copy, Cut or Paste command. Press the button. If your last operation was a UNDO Paste command, the display would read: Undo Last Track Paste? Y /N Press the (L) button. The display should read: Undo Track Paste Are You Sure? Y /N Press the...

  • Page 65: More About Editing

    editing • chapter 6 More about editing If you’re familiar with digital audio editing, you know that an abrupt change from one region to another when making an edit can cause a “click” or “pop”. This would happen if the sample number jumps drastically from the original material to the pasted material.

  • Page 66: 88.2/96 Khz Sampling Rates

    ADAT Optical ports. But its analog I/O, as shipped from the factory, is only capable of operation up to 48 kHz. Your Alesis dealer can install an optional upgrade kit that allows analog input and output at the higher sample rate (see page 66).

  • Page 67: How Adat Optical Handles A 96 Or 88.2K Signal

    The optional 96k Analog I/O boards Alesis offers an optional set of converter circuit boards which, when installed, allow you to record and play back at 88.1kHz or 96kHz using the 1/4” analog inputs and outputs. Without this option, 88.1k and 96k recording is available only...

  • Page 68: Synchronization

    MTC input of your synchronizer, then connect the synchronizer’s ADAT Sync output to the HD24’s ADAT Sync Input. Ask your Alesis dealer about other ADAT- compatible synchronizer options. ADAT HD24 Reference Manual Synchronization and MIDI...

  • Page 69: Midi

    synchronization and MIDI • chapter 8 MIDI HD24’s MIDI jacks synchronization, software updates, and machine control. Press the button on the HD24’s front MIDI panel to scroll between the MIDI function pages. You can also hold the button down and press MIDI (L ) or (M ) buttons to quickly scroll...

  • Page 70: Using The Hd24 With Tape-Based Adats

    Using the HD24 with tape-based ADATs The ADAT Sync jacks on the back of the HD24 are designed to allow easy hookup with previous generations of ADAT that used S-VHS tape as their media: the original “black” ADAT, the ADAT XT, XT20, LX20, and the M20, as well as other devices that have the ADAT Sync interface such as the BRC Master Remote Control and computer interface...

  • Page 71: Using The Adat Hd24 With The Brc Master Remote Control

    synchronization and MIDI • chapter 8 Using the ADAT HD24 with the BRC Master Remote Control The BRC Master Remote Control has been the standard for controlling multi-ADAT systems since its introduction. It can control multiple transports, arm up to 128 tracks in a system, receive and generate SMPTE time code, and slave an ADAT system to time code, video, and word clock.
  • Page 72 The BRC’s • SAVE SETUP TO TAPE commands (which saves the BRC’s FROM TAPE internal data and song setups to the DATA section at the head of an ADAT tape) are not supported by the HD24. So, if an HD24 is first in the Sync chain following the BRC, then the BRC’s song data cannot be saved or restored.

  • Page 73: Using The Hd24 With The M20

    synchronization and MIDI • chapter 8 Using the HD24 with the M20 The M20 and its remote control, the CADI, have the most advanced synchronization capabilities of any ADAT product. The M20 is designed to meet the needs of video and film post production, including SMPTE synchronization at 44.1 and 48 kHz sampling rates including pull-up and pull-down for film transfer capabilities.

  • Page 74: When You'd Use Ethernet And The Hd24

    When you'd use Ethernet and the HD24 Ethernet is a method for connecting multiple computers and peripherals (such as printers and disk arrays) in a network. Most offices tie their computers together in a network so they can share files and software between them, and all print to a central, shared printer.

  • Page 75: Materials You Will Need

    using Ethernet • chapter 9 Materials you will need First, you need the hardware and cabling to connect your ADAT HD24 via Ethernet. Your computer may also need additional hardware and software. The HD24's Ethernet connection is designed to be used with 10Base-T systems, since these are the type most commonly available.

  • Page 76: Setting The Ip Parameters Of The Adat Hd24

    Setting the IP parameters of the ADAT HD24 Before you can connect the ADAT HD24 to a computer or network using its Ethernet port, you have to set the IP (Internet Protocol) address and subnet mask of the HD24 and tell it to start acting as an FTP server instead of as a multitrack recorder for a while.

  • Page 77: About Setting Up Your Computer

    More information regarding networking with your HD24 will be available support/FAQ www.alesis.com . To learn more about general networking issues, open the manual for your computer, and check web sites such as: The World of Windows Networking http://www.wown.com...

  • Page 78: Apple Macintosh Configuration Instructions

    HD24 only when the power is off to avoid damage. Read the instructions that came with your computer regarding Ethernet connections and operation. Alesis is not responsible for damage to hardware or software caused by improper connection or operation. Connection...
  • Page 79 using Ethernet • chapter 9 To change the TCP/IP settings: These instructions assume that your Macintosh is NOT connected already to a network. If you're already on a network, you may need to follow special instructions from the person in charge of it. 1.
  • Page 80 To turn on AppleTalk: To communicate with the ADAT HD24, the Macintosh must be set to use AppleTalk, via the Ethernet port. If you're not already doing that: Open up the AppleTalk control panel (Apple menu/Control Panels/AppleTalk). As you did on the TCP/IP control panel, we recommend that you duplicate the current configuration and rename it, so it's easy to go back to your previous settings.

  • Page 81: Windows 95/98/Me Pc Configuration Instructions

    using Ethernet • chapter 9 Windows 95/98/ME PC configuration instructions If you own a PC, you must make sure it has an Ethernet port first. If you’ve just purchased a network card, then you need to follow the manufacturer’s instructions for installation. Please complete the network card installation first, then install TCP/IP before proceeding, if it isn't already present.
  • Page 82 After a few seconds, you will be brought back to the main Network window. The TCP/IP Protocol should now be listed. Click O K . Windows may ask for original Windows installation files. Supply them as needed. You may have to find your Windows 95/98/ME install CD.
  • Page 83 using Ethernet • chapter 9 To set the IP address of a Windows 95/98/ME PC: 1. Click the Start button. Choose Settings, then Control Panel. 2. Double-click the Network icon. Your Network window should Configuration tab. In the Configuration window, select the TCP/IP protocol line that has been associated with your network card/adapter.

  • Page 84: Verifying A Pc's Connection To The Hd24

    HD24 only when the power is off to avoid damage. Read the instructions that came with your computer regarding Ethernet connections and operation. Alesis is not responsible for damage to hardware or software caused by improper connection or operation. To test the connection between a PC and the HD24 using Ping: 1.

  • Page 85: Transferring Files With Explorer

    using Ethernet • chapter 9 Transferring files with Explorer Once you're sure that: • the computer has the correct network settings • the HD24's IP address and passwords are set, and the HD24 is in FTP server mode • you're ready to launch software in the computer that can download files from the HD24.

  • Page 86: Tips And Tricks About Explorer

    Click and hold on an individual track you want to download. Drag it to the desktop (or to a folder). Tracks must be downloaded one at a time (or see Tip on Using File Helpers, below). If you simply click on a file, your browser may attempt to download and open the audio to play it from within the browser.

  • Page 87: To Upload Files From The Computer To The Hd24

    using Ethernet • chapter 9 To upload files from the computer to the HD24 After you have edited audio in the computer, you can send it back to the HD24, with certain limitations: • The file name must follow the format "TrackXX.aif"...

  • Page 88: About The Subnet Mask

    About the subnet mask The subnet mask is a standard parameter used for TCP/IP networking. On the HD24, the subnet mask is used to determine how many computers are on your local network. For instance, if your HD24 IP address is set to A.B.C.D, and your subnet mask is set to 255.255.255.0, then you are telling the HD24 to look for any computer from A.B.C.0 to A.B.C.255 on the local network.

  • Page 89: To Quit Ftp Server Mode

    using Ethernet • chapter 9 To quit FTP server mode Once your transfers are complete, you must leave FTP server mode in order to resume normal recording and playback from the ADAT HD24. 1. Make sure that all downloads are complete and all users have logged off the system.

  • Page 90: An Example Network

    An Example Network The following network diagram can be used a guide to help you setup your internal network. In this scenario, the internal network consists of seven different elements: The Router, the PC, the Mac, three HD24s and the Hub. The Router is assigned the internal address of 192.168.1.200.
  • Page 91 using Ethernet • chapter 9 ADAT HD24 Reference Manual...

  • Page 92: Troubleshooting Index

    Troubleshooting Index If you experience problems while operating your ADAT HD24, please use the following table to locate possible causes and solutions before contacting Alesis Product Support for assistance. Symptom No audio from outputs No audio input or output on certain channels...
  • Page 93 troubleshooting • chapter 10 Symptom Drive will not mount “Blips” are heard at the edit points after pasting audio AC hum Cannot select ANALOG input Song shows incorrect data on screen HD24 will not synchronize to SYNC IN Cannot find any spoon Cause Empty caddy Install an IDE drive in the...

  • Page 94: Avoiding Ground Loop Noise

    Avoiding ground loop noise In today’s studio, where it seems every piece of equipment has its own computer chip inside, there are many opportunities for ground loop problems to occur. These show up as hums, buzzes or sometimes radio reception and can occur if a piece of equipment “sees”...

  • Page 95: Care And Maintenance

    THE LUBRICANTS USED IN THE SWITCHES AND CONTROLS! Spray onto a cloth, then use cloth to clean the unit. Refer All Servicing to Alesis We believe that the ADAT HD24 is one of the best multitrack recorders that can be made using current technology, and should provide years of trouble-free use.

  • Page 96: Obtaining Repair Service

    Tape a note to the top of the unit describing the problem, include your name and a phone number where Alesis can contact you if necessary, as well as instructions on where you want the product returned. Alesis will pay for standard one-way shipping back to you on any repair covered under the terms of this warranty.
  • Page 97 troubleshooting • chapter 10 ADAT HD24 Reference Manual...

  • Page 98: Specifications

    AUDIO INPUT Input Connectors: Nominal Input Level: Maximum Input Level: Input impedance: AUDIO OUTPUT Output Connectors: Nominal Output Level: Maximum Output Level: Output impedance: AUDIO PERFORMANCE Signal to Noise Ratio: THD+N: Frequency Response: Power consumption: MECHANICAL Size: Rack spaces: Weight: All measurements done over a 22 Hz - 22 kHz range with 1 kHz sine wave at 18dBu (-1dBFS) input.

  • Page 99: Dimensional Drawing

    specifications Dimensional drawing ADAT HD24 Reference Manual...
  • Page 100 16-bit, 25 20-bit, 25 88.2 kHz, 65 96 kHz, 65 96kHz converter board option, 66 AC power and noise, 93 ADAT, 24 synchronization with, 69 ADAT FST™, 3 ADAT Optical, 25, 70 and 96 kHz, 66 ADAT Sync, 17, 39, 70 AIFF files, 73 ALL INPUT, 39 ALL INPUT button, 40...
  • Page 101 index scan, 41 scrub, 35 for edit points, 57 scrubbing, 41, 69 from M20/CADI, 72 selecting drives, 49 SET LOCATE, 44, 55 shock, 7 slave, 69 SMPTE time code, 70, 72 Snakes, 21 software updating code, 68 SONG SEL, 32 Songs, 31 Specifications, 97 STOP, 35...

  • Page 102: Alesis Limited Warranty

    Return Authorization Number and instructions concerning where to return the unit for service. All inquiries must be accompanied by a description of the problem. All authorized returns must be sent to ALESIS or an authorized ALESIS repair facility postage prepaid, insured and properly packaged. Proof of purchase must be presented in the form of a bill of sale, canceled check or some other positive proof that the product is within the warranty period.

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