Windows tooling

mono-izer

Right-click a stereo WAV or MP3 and get a mono copy, or split it into two mono files. Nothing else touched.

Built for stacks of 48 kHz 24-bit recordings that were tracked in stereo but only need one side. Sample rate, bit depth and tags stay exactly as they were.

Download v1.1.0 (.exe)GitHub →

Windows 10/11 · No admin rights required · ffmpeg installed for you if missing

Before and after

Stereo in — left (teal) and right (orange)

Stereo waveform: left channel in teal, right channel in orange

Mono out — the left channel, untouched

Split L / R — one prefix per side, asked once per batch

The Split L / R dialog with a left prefix Kick_ and a right prefix Snare_

What it does

Channel keptLeft. The right channel is removed — no downmix, so the level does not change

WAVSame PCM format and sample rate — 48 kHz 24-bit in, 48 kHz 24-bit mono out, bit-for-bit

MP3Re-encoded once at the source bitrate; tags and cover art kept

Output<name>_mono.wav next to the original — never overwrites, never touches the source

Split L / RTwo mono files, <left prefix><name> and <right prefix><name> — each channel bit-for-bit

Mono inputSkipped

Features

Right-Click, Done

Select stereo .wav or .mp3 files in Explorer, right-click, open mono-izer and pick Make mono (left channel). No window, no settings — the mono copy appears next to each file.

Split L / R

Two sources on one stereo file? Pick Split L / R and type a prefix for each side — Kick_ and Snare_, say. Each file becomes two mono files, one per channel. One dialog for the whole selection, and it remembers your last prefixes.

Lossless for WAV

The output uses the same PCM codec as the source, and ffmpeg's channelmap copies the left channel without converting the sample format. The mono file is bit-for-bit identical to the source's left channel.

Batch Without the Load

Select a whole session of recordings and right-click once. Files are converted one at a time at low priority, so a long batch does not slow down anything else running.

Never Overwrites

If take_mono.wav already exists, the next one is take_mono_2.wav. Errors are collected into one dialog at the end of the batch, and every result goes to a log file.

Installs What It Needs

If ffmpeg is not on your PATH, the installer downloads the newest release from GitHub, checks its SHA-256 and adds it to your PATH. FFmpeg Convert, Shrink Menu and Doc Convert share the same copy.

No Admin Rights

All registry keys written to HKCU. Installs and uninstalls without an elevation prompt, with a normal entry in Settings › Apps.

Install

One-click (recommended)

Download MonoIzer-Install.exe from Releases and run it. Installs to %LOCALAPPDATA%\MonoIzer\ with no admin prompt. The installer is code-signed (publisher Yuval Olsha) and runs no scripts.

Manual install

powershell -ExecutionPolicy Bypass -File install.ps1

Stack

PowerShellffmpegC# launcherHKCU RegistryInno SetupAzure Artifact Signing