Zoom UAC-232 Manuel utilisateur
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.
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registered trademarks in this document are for identification purposes only and are not intended to infringe on the copyrights of their respective owners.
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Notes about this Operation Manual
You might need this manual in the future. Always keep it in a place where you can access it easily.
The contents of this document and the specifications of the product could be changed without notice.
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and other countries, and it is used under license.
• USB Type-C is a trademark of the USB Implementers Forum.
• Other 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.
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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.
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Contents
Notes about this Operation Manual........................................................................................................................ 2
UAC-232 overview........................................................................................................................................................5
High-quality audio inputs........................................................................................................................................... 5
Functions of parts..................................................................................................................................................... 10
Connecting to computers........................................................................................................................................ 13
Preparing for use with a Mac computer............................................................................................................... 14
Preparing for use with a Windows computer...................................................................................................... 15
Connecting to iOS/iPadOS devices......................................................................................................................... 18
Using an external power supply.............................................................................................................................19
Connecting instruments and mics..........................................................................................................................20
Connecting instruments........................................................................................................................................... 21
Connecting mics.........................................................................................................................................................23
Using direct monitoring............................................................................................................................................25
Adjusting the volume................................................................................................................................................26
Adjusting the output volume.................................................................................................................................. 26
Adjusting the headphone volume.......................................................................................................................... 26
Using ZOOM UAC-232 Mix Control.........................................................................................................................27
Installing ZOOM UAC-232 Mix Control.................................................................................................................. 27
ZOOM UAC-232 Mix Control Screen...................................................................................................................... 28
Adjusting waveform display size.............................................................................................................................30
Overview of Music and Streaming modes............................................................................................................ 31
Adjusting direct monitoring..................................................................................................................................... 33
Adjusting the streaming mixer................................................................................................................................34
Enabling the loopback function.............................................................................................................................. 35
Restoring factory default settings.......................................................................................................................... 37
Managing the firmware............................................................................................................................................38
Checking the firmware version............................................................................................................................... 38
Updating the firmware............................................................................................................................................. 38
Use example: Making music....................................................................................................................................39
Use example: Web streaming using a computer.................................................................................................42
Use example: Web streaming using an iOS/iPadOS device................................................................................45
Using the included flat cable fasteners.................................................................................................................48
Mixer diagram............................................................................................................................................................49
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
Playback sound cannot be heard or is quiet........................................................................................................52
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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
4
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.
5
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.
6
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.
Providing amazing dynamic range
By combining two A/D converters, a wide dynamic range not possible with a single A/D converter has been
realized.
High-gain
AD converter
Low-gain
AD converter
AD converter
switches in
response to
input level
・Airplane
・Nearby thunder
・Train passing on tracks overhead
・Inside train
・Shouting
・Grand piano
・Noisy street
・Chimes
・Ordinary conversation
・Whispering
・Quiet library
・Late night in suburb
Wide dynamic range covered
by two AD converters
Input gain adjusted to
desired recording volume
Dual AD converters
Conventional equipment
7
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
because high-gain
AD converter selected
Low noise
because high-gain
AD converter selected
No clipping
because low-gain
AD converter selected
8
32-bit float WAV file overview
32-bit float WAV files have the following advantages over conventional 16/24-bit linear WAV files.
These features enable the quality of the sound during recording to be maintained when editing in DAWs
and other software.
Resolution advantage
32-bit float WAV files have the advantage of being able to maintain high resolution even at low volumes. As
a result, quiet sounds can be made louder when editing after recording without degrading their quality.
■ 16/24-bit linear WAV
Volume raised
Resolution is low
■ 32-bit float WAV
Volume raised
Resolution is high
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.
■ 16/24-bit linear WAV
Clipped recording
Volume lowered
Still clipped
■ 32-bit float WAV
Clipped recording
Volume lowered
Not clipped
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Functions of parts
Front
❶Input 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. (→
Connecting instruments and mics)
XLR
12
3
1: GND
2: HOT
3: COLD
❷PHANTOM POWER switches
These turn +48V phantom power on/off. Set this to ON when connecting condenser mics.
❸GUITAR/BASS switch
Use this to enable Hi-Z support for the Input jack 1 circuit. Turn this on as necessary for the connected
guitar or bass.
❹SIGNAL indicators
These light when signals are being input.
❺Headphone jack
This outputs a stereo signal. Connect headphones here.
❻Headphone knob
Use this to adjust the headphone volume. (→ Adjusting the headphone volume)
❼Power indicator
This lights when the power is on.
❽OUTPUT knob
Use this to adjust the volume of the signals output from the OUTPUT jacks. (→ Adjusting the output
volume)
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1
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