Zoom UAC-232 Operation Manual
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Zoom UAC-232 Operation Manual

Zoom UAC-232 Operation Manual

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USB AUDIO CONVERTER
Operation Manual
You must read the Usage and Safety Precautions before use.
©2023 ZOOM CORPORATION
Copying or reprinting this manual in part or in whole without permission is prohibited.
Product names, registered trademarks and company names in this document are the property of their respective companies. All trademarks and
registered trademarks in this document are for identification purposes only and are not intended to infringe on the copyrights of their respective owners.
Proper display is not possible on grayscale devices.

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  • Page 1 Operation Manual You must read the Usage and Safety Precautions before use. ©2023 ZOOM CORPORATION Copying or reprinting this manual in part or in whole without permission is prohibited. Product names, registered trademarks and company names in this document are the property of their respective companies. All trademarks and registered trademarks in this document are for identification purposes only and are not intended to infringe on the copyrights of their respective owners.

  • Page 2: Notes About This Operation Manual

    • Recording from copyrighted sources, including CDs, records, tapes, live performances, video works and broadcasts, without permission of the copyright holder for any purpose other than personal use is prohibited by law. ZOOM CORPORATION will not assume any responsibility related to infringements of copyrights.

  • Page 3: Table Of Contents

    Terms used in this manual............................50 Troubleshooting.................................51 Not recognized by computer when connected....................51 Cannot select or use the UAC-232 device......................51 The sound of the device connected to the input jack is distorted, too quiet or silent........51 Cannot play or record.............................. 52...
  • Page 4 Cannot be used with an iOS/iPadOS device......................52 Sound breaks up during playback or recording....................52 Noise is loud during direct monitoring......................... 52 Specifications................................53...

  • Page 5: Uac-232 Overview

    High-quality audio inputs Using original dual A/D converter circuits and 32-bit float recording technologies with a maximum sample rate of 192 kHz, the UAC-232 can process input signals as super-high-resolution audio without any need for gain adjustments. Audio input with no need for gain adjustment Dual A/D converter circuits enable recording sound ranging from quiet to loud without making gain adjustments.
  • Page 6 Editing in DAWs and other software Since 32-bit Float WAV file format is used for recording, the recording audio quality is retained when editing.
  • Page 7 Dual A/D converter circuit overview The UAC-232 has two A/D converters with different input gains for each input circuit. This design enables high-quality audio recording with a DAW, for example, without the need to adjust input gain settings, a step that is normally indispensable.
  • Page 8 Switching between two A/D converters The UAC-232 constantly monitors data from the two A/D converters, and automatically selects the one that provides the best recording results. Low noise No clipping Low noise because high-gain because low-gain because high-gain AD converter selected...
  • Page 9 Clipping advantage If a waveform sounds clipped when output from the UAC-232 or in a DAW, it can be edited after recording to lower its volume and restore an unclipped waveform because the data in the 32-bit float WAV file itself is not clipped.

  • Page 10: Functions Of Parts

    Functions of parts Front ❶ Input jacks 1–2 These input jacks have built-in mic preamps. Connect mics, keyboards, guitars and other audio sources to them. These can be used with both XLR and standard phone (balanced or unbalanced) plugs. Please use XLR plugs to connect mics and phone plugs to connect keyboards and guitars, for example.
  • Page 11 ❾ DIRECT MONITOR switch Turn this on to directly monitor sounds from the input jacks before they pass through the computer. (→ Using direct monitoring) ❿ 32-BIT FLOAT indicator This lights when the UAC-232 is operating in 32-bit float mode.
  • Page 12 Back ❶ DC 5V port (Type-C) Use this power supply USB port to connect an AC adapter or portable battery. (→ Using an external power supply) ❷ USB port (Type-C) Use this USB port to connect with a computer or iOS/iPadOS device. (→ Connecting to computers, Connecting to iOS/iPadOS...

  • Page 13: Connecting To Computers

    Connecting to computers The UAC-232 is compatible with USB bus power, so power can be supplied to it from a computer through a USB cable. Install the dedicated driver before using a UAC-232 to record for the first time with a DAW application on a Windows computer.

  • Page 14: Preparing For Use With A Mac Computer

    The following settings must be made to use the UAC-232 at 32-bit float with a Mac. Open the Audio MIDI Setup app, which is in the Utilities subfolder of the Applications folder on the Mac. Select ZOOM UAC-232 in the Audio Devices, and set the input and output formats to 32-bit float.

  • Page 15: Preparing For Use With A Windows Computer

    NOTE: The latest ZOOM UAC-232 Driver can be downloaded from the above website. Launch the installer and follow the instructions to install the ZOOM UAC-232 Driver. NOTE: • Do not connect the UAC-232 to the computer during installation.
  • Page 16 This sets the size of the buffer used by the driver. Raising the value makes operation more stable but also increases latency. ❷ Sample rate setting This sets the sampling frequency used by the UAC-232. If this is also set in the DAW or other application, that setting might be given priority. ❸ Transmission format setting...
  • Page 17 This should normally be left set to “32-bit Float”. Try “24-bit”, though, if this setting does not work properly with an application. ❹ Open an information dialog Use this to check the version, for example. ❺ Close the control panel Use this to close the control panel.

  • Page 18: Connecting To Ios/Ipados Devices

    NOTE: Power must be provided before connecting an iOS/iPadOS device to the UAC-232. Use a USB cable to connect the UAC-232 USB port (Type-C) to the iOS/iPadOS device. USB Type-C When connecting an iOS/iPadOS device, prepare USB cables and adapters that match its connectors as necessary.

  • Page 19: Using An External Power Supply

    Using an external power supply A dedicated AC adapter (ZOOM AD-17) or a commercially-available USB portable battery can be used. Connect the USB connector of the dedicated AC adapter to the DC 5V port (Type-C), and plug the AC adapter into an outlet.

  • Page 20: Connecting Instruments And Mics

    The UAC-232 adjusts the gain (amplification) of input signals according to their sources to raise them to levels that are easy to work with. The default gain amounts are as follows. Input source Gain Dynamic mic (phantom power off)

  • Page 21: Connecting Instruments

    Connecting instruments Connect an instrument to the UAC-232. • Use an instrument cable to connect a guitar or bass, for example, to the Input 1 jack. • Use instrument or TRS cables to connect a keyboard or mixer, for example, to the Input 1–2 jacks.
  • Page 22 When connecting a guitar or bass guitar, press so that it lights. Explanation status Use this setting when connecting a guitar or bass. On (lit) High-impedance (Hi-Z) input is supported when is lit. Off (unlit) Use this setting when connecting a mic or keyboard, for example. NOTE: •...

  • Page 23: Connecting Mics

    Connecting mics Use mic cables to connect dynamic and condenser mics to the Input 1 and 2 jacks. When connecting a mic to the Input 1 jack, if is lit, press to make it unlit. Press so that they light when connecting condenser mics. Explanation status On (lit)
  • Page 24 NOTE: • Please use XLR plugs when connecting mics. • Do not turn on when connecting equipment that is not compatible with phantom power. Doing so could damage the equipment.

  • Page 25: Using Direct Monitoring

    Using direct monitoring When direct monitoring is turned on, sound input to the UAC-232 can be directly monitored using headphones, for example, before it passes through the computer. This enables monitoring without latency. Press so that it lights. HINT: The direct monitoring mix levels can be adjusted using ZOOM UAC-232 Mix Control. (→...

  • Page 26: Adjusting The Volume

    The connected jacks have different knobs to adjust their volumes. NOTE: Minimize the UAC-232 volume before connecting speakers or headphones. Failure to do so could result in unexpected loud sounds, causing harm to hearing, for example. Adjusting the output volume Turn to adjust the volume for the OUTPUT jacks on the back of the unit.

  • Page 27: Using Zoom Uac-232 Mix Control

    This will install UAC-232 Mix Control. NOTE: If a DAW or another app that uses MIDI ports is already running, the MIDI ports for ZOOM UAC-232 Mix Control will be used and proper connection might not be possible. Either launch ZOOM UAC-232 Mix Control before the other application or change the settings of that...

  • Page 28: Zoom Uac-232 Mix Control Screen

    ZOOM UAC-232 Mix Control Screen ❶ Input level sliders Use these to adjust the input signal gain for each channel. (→ Adjusting waveform display size) ❷ Input signal levels These show the input signal levels of each channel. (→ Adjusting waveform display size) ❸...
  • Page 29 ❽ Loopback switch This turns the loopback function on/off. (→ Enabling the loopback function)

  • Page 30: Adjusting Waveform Display Size

    • When using a DAW app that does not support 32-bit float recording, input exceeding a certain level could cause distortion. If this occurs, the waveform size can be reduced to avoid this. • A list of applications that have been checked for compatibility with 32-bit float recording is available on the ZOOM website (zoomcorp.com).

  • Page 31: Overview Of Music And Streaming Modes

    Music mode The Music mode setting is good for making music with a DAW, for example. to Music in ZOOM UAC-232 Mix Control. (Music mode is enabled when the unit is first used after purchase or initialization.) This mode is useful for recording a guitar and vocals simultaneously to separate tracks, for example. Input sounds are handled as separate signals by the computer or iOS/iPadOS device in the same way as with an ordinary audio interface.
  • Page 32 Streaming mode The Streaming mode setting is good for web streaming. to Streaming in ZOOM UAC-232 Mix Control. This mode is useful for streaming solo performances of vocals accompanied by guitar, for example. Input sounds can be mixed like using an audio mixer and then sent to the computer or iOS/iPadOS device.

  • Page 33: Adjusting Direct Monitoring

    Adjusting direct monitoring Enable Music mode. Press to enable Music mode. Adjust direct monitoring levels. Turn to adjust the levels of each channel. If levels are raised too high using , the output sound could be clipped. Adjust them so that the level indicators do not light red.

  • Page 34: Adjusting The Streaming Mixer

    Adjusting the streaming mixer Enable Streaming mode. Press to enable Streaming mode. Adjust streaming mixer levels. Turn to adjust the levels of each channel. If levels are raised too high using , the streamed sound could be clipped. Adjust them so that the level indicators do not light red.

  • Page 35: Enabling The Loopback Function

    Enabling the loopback function By turning on the Loopback function, sound input through the UAC-232 Input 1–2 jacks and sound output from the computer can be mixed and then input to the computer again (looped back). This is convenient for mixing background music played on the computer with sound input through the UAC-232 and streaming it live, for example.
  • Page 36 NOTE: When the UAC-232 loopback function is enabled, disable monitoring of the UAC-232 in the DAW or streaming application. If enabled, a feedback loop could be generated, which might cause loud noise to be output.

  • Page 37: Restoring Factory Default Settings

    Restoring factory default settings This will restore the settings of the UAC-232 switches and internal mixer to their factory default values. While pressing for Input jack 1, connect a USB cable to power the unit. Initialize the settings. Execute Cancel Press for Input jack 1.

  • Page 38: Managing The Firmware

    Control) Updating the firmware The UAC-232 firmware can be updated to the latest version. Files for the latest firmware updates can be downloaded from the ZOOM website (zoomcorp.com). Follow the instructions in the “UAC-232 Firmware Update Guide” on the UAC-232 download page.

  • Page 39: Use Example: Making Music

    To make music using a DAW app to record guitar and vocals at the same time, for example, use the UAC-232 in Music mode. (Music mode is enabled when the unit is first used after purchase or initialization.) The audio from the guitar and vocals can be recorded to separate tracks.
  • Page 40 Supply power if using an iOS/iPadOS device. (→ Using an external power supply) NOTE: Power must be provided before connecting an iOS/iPadOS device to the UAC-232. Connect the UAC-232 and the computer or iOS/iPadOS device. (→ Connecting to computers, Connecting to iOS/iPadOS...
  • Page 41 (→ Turn Adjusting the volume) Launch the DAW app on the computer or iOS/iPadOS device and select the UAC-232 as the audio device. Create a 32-bit float project and start recording. NOTE: Refer to the DAW app manual for how to use it.

  • Page 42: Use Example: Web Streaming Using A Computer

    Use example: Web streaming using a computer When connecting with a computer for web streaming, set the UAC-232 to Streaming mode. Using the ZOOM UAC-232 Mix Control app is necessary to switch the UAC-232 to Streaming mode. (→ Using ZOOM...
  • Page 43 UAC-232 INPUT1 INPUT1 INPUT2 INPUT2 OUTPUT 1/2 OUTPUT Connect the UAC-232 and the computer. (→ Connecting to computers) USB Type-C Connect the mic and instrument and set the switches. (→ Connecting instruments, Connecting mics)
  • Page 44 (→ Turn Adjusting the volume) Launch the streaming app on the computer, and select the UAC-232 as the “audio” or “input/output” device. Start streaming. NOTE: • Use BGM with permission from its creators. • Refer to the streaming app manual for how to use it.

  • Page 45: Use Example: Web Streaming Using An Ios/Ipados Device

    Use example: Web streaming using an iOS/ iPadOS device When using an iOS/iPadOS device for web streaming, switch the UAC-232 to Streaming mode. ON AIR ON AIR to Streaming mode in ZOOM UAC-232 Mix Control. (→ Streaming mode)
  • Page 46 OUTPUT Supply power. (→ Using an external power supply) NOTE: Power must be provided before connecting an iOS/iPadOS device to the UAC-232. (→Connecting to iOS/iPadOS Connect the UAC-232 and the iOS/iPadOS device. devices) USB Type-C Connect the mic and instrument and set the switches. (→...
  • Page 47 to adjust the output volume. (→ Turn Adjusting the volume) Launch the streaming app on the iOS/iPadOS device and start streaming. NOTE: Refer to the streaming app manual for how to use it.

  • Page 48: Using The Included Flat Cable Fasteners

    Using the included flat cable fasteners The included flat cable fasteners are useful for attaching cables to the handles on the sides, for example. In addition, they can be used to hold the interface in place or to attach it to a mic stand.

  • Page 49: Mixer Diagram

    Mixer diagram...

  • Page 50: Terms Used In This Manual

    Terms used in this manual USB audio interface This is equipment that can input sound from mics and instruments, for example, to a computer or iOS/ iPadOS device and output sound from that device to speakers and headphones. Dynamic mic These mics do not require phantom power and are tough and durable.

  • Page 51: Troubleshooting

    Not recognized by computer when connected • Use a USB cable that supports data transfer. • Confirm that the USB cable is connected to the standard USB port on the UAC-232 and not to the DC 5V port. Cannot select or use the UAC-232 device •...

  • Page 52: Cannot Play Or Record

    • Turn off the automatic sleep function and other computer power saving settings. • If using a USB hub, stop using it. Connect the UAC-232 directly to a USB port on the computer. • We provide methods to optimize Windows computer settings for music production on our website (zoomcorp.com).
  • Page 53 Specifications Input and output channels Number of input Mono (MIC/LINE) channels Number of output Stereo (TRS) channels Stereo (headphone) Connectors Inputs 1-2 Type XLR/TRS combo jack (XLR: 2 HOT/TRS: TIP HOT) Input impedance XLR: 2.7 kΩ TRS: 4 kΩ/1 MΩ (when Hi-Z on) Maximum input level XLR: +6 dBu TRS: +24 dBu / +11.5 dBu (when Hi-...
  • Page 54 32-bit float / 24-bit Interface USB 2.0 Class USB Audio Class 2.0 Power AC adapter (ZOOM AD-17): DC 5 V/1 • USB bus power is supported. Rated current USB / AC adapter (5 V): 293 mA Power consumption 5 W maximum Dimensions 164 mm (W) ×...
  • Page 55 ZOOM CORPORATION 4-4-3 Kanda-surugadai, Chiyoda-ku, Tokyo 101-0062 Japan zoomcorp.com Z2I-4794-01...

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