4ms/wav-recorder

WAV Recorder

4ms

High fidelity two-channel stereo audio recorder with basic playback features. Records lossless WAV files up to 96kHz/24-bit onto microSD card; accepts line-level to modular-level signals; features a Gain knob for up to +20dB boost and an LED Signal Meter.814

Capabilities 2

Audio Recorderaudio-recorder
Records stereo or mono WAV files to microSD card at up to 96kHz/24-bit; configurable sample rate, bit depth, and channel count via System Mode.814
Sample Playersample-player
Plays back WAV files from microSD card; supports file/folder browsing; playback activated by button press or trigger jack.814

Jacks 5 — 3 in / 2 out

NameSignalVoltageDescription
Inputs (3)
Left INaudio-10V to 10VLeft audio input. Normalized to Right IN when Right IN is unpatched. Accepts line level to modular level signals.814
Recordtrigger1.6V to 12VTrigger input jack. In Record mode, toggles recording start/stop. In Playback mode, starts or restarts playback. Used for synchronizing with clocks or other WAV Recorder modules.814
Right INaudio-11V to 11VRight audio input for stereo recording. Accepts line level to modular level signals.814
Outputs (2)
Left OUTaudio-10.5V to 10.5VLeft channel audio output for monitoring while recording and for playback of WAV files.814
Right OUTaudioRight channel audio output for monitoring while recording and for playback of WAV files.814

Parameters 7

NameTypeRangeBehavior
Bitsmenu_settingSets the recording bit depth. Options: 24 bits or 16 bits. Accessible in System Mode. Default factory setting is 16-bit.814
ButtonbuttonIn Record mode: press once to start recording (button turns red), press again to stop. In Playback mode: press once to play selected file (button turns green), press again to stop. Hold for 2 seconds in Record mode to check free space / mount card. Hold for 5 seconds in Record mode to enter System Mode. Hold while turning knob in Playback mode to browse files and folders.814
Channelsmenu_settingSets recording to stereo or mono. Accessible in System Mode. Default factory setting is stereo.814
Input Gainknob≤20dBAdjusts the level of the audio signal for recording and monitoring. Also adjusts playback volume. Used to avoid clipping (top red lights on Signal Meter) and to boost quiet signals.814
Left->Right JumperjumperWhen installed (default), normalizes the Left IN jack to the Right IN jack so a mono signal is recorded to both channels. Remove only when connecting to a 4ms Listen module via the 3-pin header.814
Record/Playback SwitchswitchToggles between Record mode (switch up) and Playback mode (switch down).814
Sample Frequencymenu_settingSets the recording sample rate. Options: 96kHz, 48kHz, or 44.1kHz. Accessible in System Mode. Default factory setting is 44.1kHz.814

Firmware history 1 version

VersionReleasedNotes
1.0Initial firmware version shipped with WAV Recorder. Supports recording at up to 96kHz/24-bit, stereo/mono WAV files, trigger-based recording/playback, file browsing, System Mode for configuring sample rate/bit depth/channels.814

References 2

  1. [814]
    WAV Recorder User Manual v1.2amanual
    verified 2026-05-23
  2. [815]
    4ms WAV Recorder product pageproduct_page
    verified 2026-05-23