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The Sampler is a high fidelity, two-channel stereo audio recorder and playback module. The Sampler can record
and play back high quality stereo WAV files. A maximum of 600 samples can be loaded at one time from the
removable microSD card, in a variety of formats up to 96kHz/32-bit/stereo WAV. All sample parameters (pitch,
sample file selection, length, bank, and start position) are CV controllable, and trigger jacks for play/record, and
reverse allow for synchronization.
• Stereo playback channels can play any of 600 samples
• Recording creates stereo WAV files directly onto microSD Card for immediate use
• Extremely low noise, high fidelity design
• Plays a variety of WAV files up to 32-bit/96kHz
• Records at 24-bit or 16-bit/48kHz (future firmware will support up to 96kHz)
• Intelligent file system makes loading large sample libraries easy by organizing banks into folders
• CV and controls for 1V/oct tracking, Start Position, Length, Sample selection, Bank, Reverse and
Play/Record
• Includes microSD card with Sample Pack and SD Card adaptor
Sampler
4ms Company
User Manual 1.0 – June 13, 2023
for firmware v1.0
Bank
Play
Pitch
Start Pos.
Pitch
Start Pos.
Left RECORD
Right
Out Left
Out Right
SAMPLER
Reverse
5
6
4
7
3
8
2
9
1
10
Sample
All
Length
Length
Sample
Bank
Play/Rec
End Out
Reverse

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Summary of Contents for 4ms Sampler

  • Page 1 Reverse SAMPLER The Sampler is a high fidelity, two-channel stereo audio recorder and playback module. The Sampler can record and play back high quality stereo WAV files. A maximum of 600 samples can be loaded at one time from the removable microSD card, in a variety of formats up to 96kHz/32-bit/stereo WAV.
  • Page 2: Table Of Contents

    ....................15 Variable Trigger Delay / Latency ................17 Color Adjustment Mode ..................17 Rebuilding the Index File ..................18 Updating Firmware (Audio Bootloader) ...............18 What version is my Sampler? ................18 microSD Card Specifications ................19 File Formats ......................19 Chart of Special Button Features ................20 Page...
  • Page 3: Setting Up Your Sampler

    4. Securely screw the Sampler to the rails of your case. Power the system on. 5. When the Sampler first turns on, it will scan the SD Card for WAV files. The lights will flash purple, yellow, and other colors. When the lights stop flashing and just the Bank light is on, the Sampler is ready to play.
  • Page 4: Electrical And Mechanical Specifications

    Recording channel: • Stereo recording can be simultaneous to operation of playback channels Easily record output of sample playback, “bouncing” a play session into a new sample file • • Recording initiated by button or trigger • Record into any sample slot in any bank Every recording is saved as a WAV file on the microSD Card •...
  • Page 5: Tutorial 1: Basic Playback

    CV keyboard or sequencer into this jack: each semitone (note) from C0 to B5 will be a different bank. Looping Pro tip: When looping, if you move the The Sampler is also great for looping Looping Sample knob it’ll immediately start samples.
  • Page 6 Pro tip: The tempo of a loop can be harnessed by using the Reverse jack. This jack will fire a The Sampler can also play samples backwards. trigger whenever the sample Simply tap the Reverse button to toggle reverse loops, restarts, or stops or forward playback.
  • Page 7: Tutorial 2: Navigating Banks

    (green with two blinks in the default Sampler sample pack). What do these flashes mean? Let’s find out! Bank Reverse Bank Organization The banks on the Sampler are arranged by colors. The colors are arranged somewhat like a rainbow: White Orange Yellow Green...
  • Page 8: Channel Playback Volume

    However, if you are using a mono signal path in your patch, you may want to use Mono Mode. In this mode, the Sampler mixes the left and right channels together and sends that to both output jacks. Note that regardless of Stereo or Mono Mode, if you play a mono file, both jacks will output the mono sample.
  • Page 9: Start/Stop Recording

    Saving new samples into slots When you record a sample, the WAV file is saved on the microSD card, and the Sampler temporarily assigns it to a bank/slot. The information telling the Sampler which sample file is assigned to which slot in the bank is not saved to the microSD card until you save it.
  • Page 10: Create A Bank By Copying A Folder Of Wav Files

    You could also copy sample(s) to an existing folder if it has less than 10 samples in it. If you remove a file from a folder, then the Sampler won’t be able to find that file and will try to find a new file to fill that slot.
  • Page 11: Folders With Color Names

    Automatic loading of new/moved files When you put the microSD card back into the Sampler and power it back up, the Sampler will recognize any new folders and will create a new bank for each one. The first 10 WAV files inside that folder (alphabetically) will be loaded into the 10 slots of the bank.
  • Page 12: Example Patches

    Sampler fire a sample multiple times per step. The CV output of the sequencer is patched to any of the CV inputs on the Sampler. If you want to use the sequencer to control pitch (playing a sample at various pitches), patch into the Pitch jack.
  • Page 13: Clock Sync And Shifting Ping-Pong Loops

    4. Now turn Start Pos down slowly. The sample should play backwards! Notice that no matter how fast you turn Start Pos, the pitch does not change. That is, you can play the sample faster or slower without changing its pitch. This is time-stretching in its most basic form. 5.
  • Page 14: Advanced Features

    However, there is a lot of variation amongst equipment, so if you want the Hold 2 seconds Sampler to be in tune, we highly recommend calibrating the Pitch jack to your own equipment. Anytime you patch a different sequencer, keyboard, or controller into the Pitch jack (and you will be wanting the tuning to be accurate), you should re-calibrate.
  • Page 15: Adjustable Fade Time (Smoother Looping)

    Sampler operates, you may edit this file with a plain text editor. The file is meant to compatible with the 4ms Stereo Triggered Sampler, so not all options are available for the Sampler (for instance, nothing regarding channel 2 is meaningful on the Sampler).
  • Page 16 This is the amount of delay automatically added after a trigger is received on the Play/Rec trigger jack, before the Pitch CV and Start Pos CV jacks are read and the sample is played. This delay allows the Sampler to work with sequencers and keyboards which output a gate before the CV stabilizes at a voltage.
  • Page 17: Variable Trigger Delay / Latency

    Note: The colors of the buttons will not match each other, and this is normal and to be expected. Do not try to adjust the colors of a button to match another button on the same Sampler module. The Page...
  • Page 18: Rebuilding The Index File

    Rebuilding the Index File The Sampler keeps track of the name of the sample file assigned to each bank/slot in a file called sample_index.dat (aka “the index file”), located in the _Sampler.system folder. If you wish to revert the Sampler to the factory organization, there is a factory original file located in a folder within the system folder, follow the instructions in the “How To”...
  • Page 19: Microsd Card Specifications

    Card Specifications • We include the ideal type of card to use with the Sampler. If you need to buy an additional card, we highly recommend that you purchase the same class of card. The Sampler works best with a UHS Speed Class 3 card (also known as U3, which is the fastest of the UHS-I type cards).
  • Page 20: Chart Of Special Button Features

    Chart of Special Button Features Playback: Looping Stereo/Mono Channel Volume Hold one second Hold 0.5 sec. Hold… and turn Play Play Bank Reverse Start Pos. Navigating Banks: Next Bank Prev Bank Go To Any Bank Hold… and tap Hold… and turn… …and/or turn Bank Bank...

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