DepoAudio v0.8.0 is here — Smart Audio Cleanup is now public. See what’s new →

User Guide

Using DepoAudio

DepoAudio turns proprietary court recordings into clean, organized, shareable audio — entirely on your machine. This guide walks through the four tabs: Convert, Player, Merge, and Library. New here? Install the app first.

1 · Convert a recording

Open the Convert tab and drop your files into the drop zone (or click Browse). DepoAudio accepts SGMCA, FTR .trm, BWF, every standard audio format, and video files (it extracts the audio track). The format of each file is identified instantly.

Choose an output mode

Mix to Stereo

All channels blended into one stereo file, with per-participant volume control. The usual choice for a single shareable recording.

Keep Original

Convert the container and codec but preserve the original channel layout untouched.

Split Channels

Write one file per channel, named by participant (Reporter, Witness, Attorney 1, Attorney 2 — all editable). Ideal when each mic needs its own track.

Pick a format

.WAV

Lossless PCM. The safe default for editing or sending to a transcription service.

.MP3

Choose 128, 192, or 320 kbps per conversion. What scopists usually ask for.

.FLAC

Lossless but ~half the size of WAV. Best for archival.

.Opus

64 kbps VBR, voice-optimized — the smallest files for long depositions.

.M4A

AAC at 128 kbps. Plays natively on iPhone, iPad, and Mac.

  1. Label and balance participants. Name each channel and adjust its volume, or let Smart Cleanup auto-level them for you.
  2. Start from a preset. Deposition, Phone Recording, Courtroom, Archive, and Quick Share each set sensible defaults you can then tweak. The Convert tab highlights which preset your current settings match.
  3. Batch the whole session. Drop every file at once — FTR Gold's 5-minute .trm segments, for instance — and DepoAudio converts them in order, showing status, format, and duration for each.
  4. Click Convert. Output lands next to the source file by default, or in the folder you choose. Every setting is remembered for next time.

2 · Clean up the audio

Smart Cleanup is built into the Convert tab. Click Scan and DepoAudio listens to your recording, flags problems, and recommends fixes — you decide what to apply. Every model runs locally; nothing is uploaded.

Remove background noise

HVAC hum, paper rustle, room noise. Pick Fast (instant) or Best Quality (DeepFilterNet3).

Balance speaker volume

Evens out quiet vs. loud participants so everyone is easy to hear.

Fix clipped audio

Reconstructs distorted peaks from recordings that were too loud.

Improve clarity

Neural bandwidth extension (FlashSR) for phone and narrow-band audio.

Quality score & turn detection

Rates the recording 1–5 and detects who is talking, how many speakers, and the speech-to-silence ratio.

Reduce room echoSoon

De-reverb for echoey rooms and hallways.

Cleanup runs on whatever accelerator your machine has — Apple Neural Engine, AMD Ryzen AI, Intel AI Boost, or a GPU — and falls back to CPU otherwise. Some models download once from Settings the first time you use them; see how the local AI works.

3 · Organize with the Library

Every conversion is filed automatically in the Library tab under a case name — inferred from the filename and always editable — then organized by case, session, and participant.

  • Search across cases and participants instead of hunting through folders.
  • Play any filed recording inline, without leaving the library.
  • Re-export a session with one click when you need a different format.
  • Archive finished matters to keep the active list tidy.

4 · Play files in the Player

The Player tab plays any audio file directly — no conversion needed. Drop in one file or a whole set.

  • Each track gets a color-coded seekbar so speakers are easy to tell apart.
  • Give every track an editable label in the playlist.
  • Full transport: play, pause, skip, and seek to any position.

5 · Merge multiple recordings

Have a backup mic or a phone dial-in of the same event? The Merge tab combines them into one clean file. There are no timestamps to line up — DepoAudio aligns the sources by sound.

  1. Add the recordings. Drop two or more captures of the same event.
  2. Auto-sync. DepoAudio detects the timing offset between them automatically.
  3. Pick a strategy. Best Quality picks the clearest source for each moment; Mix All blends everything together. Then export to any output format.