A bulk audio compressor for quickly reducing the size of a single file, multiple files, or entire folders. Process large collections — from one track to hundreds or thousands of audio files — without compressing every file manually.

InBAC helps free up storage space, reduce the size of music, podcasts, voice recordings, lectures, and other audio files, and save time with batch compression.

BULK AUDIO COMPRESSION

Select one file, multiple files, or an entire folder. InBAC automatically processes the selected batch and creates compressed audio files in M4A format.

Supported input formats:

• MP3

• M4A

• AAC

• WAV

• FLAC

• OGG / Vorbis

• Opus

The output format is M4A. There is no need to configure conversions or choose complicated codecs: InBAC is designed specifically as an audio compressor, not a universal converter.

4 SIMPLE COMPRESSION LEVELS

Choose the right balance between audio quality and file size:

• Light — 250 kbps

• Balance — 192 kbps

• Strong — 128 kbps

• Maximum — 64 kbps

Before compression starts, InBAC shows the current size, estimated new size, expected savings, reduction percentage, and target bitrate.

SMART BATCH COMPRESSION

If some files already have a bitrate equal to or lower than the selected target, InBAC can skip them as already optimized and continue processing the remaining files. This helps avoid unnecessary recompression and additional quality loss.

If all selected files already have a low bitrate, the app warns you before processing begins.

WORKS IN THE BACKGROUND

Compressing a large folder should not keep you stuck on one screen. InBAC supports long-running background processing and displays current progress in a notification:

• completion percentage;

• number of processed files;

• total number of files;

• current file;

• option to cancel the operation.

You can continue using your phone while batch audio compression runs in the background.

STABLE LARGE-BATCH PROCESSING

One damaged or incompatible file does not stop the entire batch. InBAC skips the problematic file, continues processing the rest, and displays the result and available reason for the error when processing is complete.

After compression, you can see:

• total number of processed files;

• how many files were compressed;

• how many were already optimized;

• how many failed;

• size before and after;

• actual storage savings.

METADATA AND COVER ART

Where technically possible, InBAC attempts to preserve compatible audio metadata, including track title, artist, album, year, track information, and cover artwork.

SIMPLE WORKFLOW

1. Select audio files or a folder.

2. Choose a compression level.

3. Check the estimated result.

4. Select where to save the files.

5. Tap “Compress audio”.

6. Get your M4A files and a clear savings report.

InBAC is suitable for music, MP3 files, podcasts, voice recordings, audiobooks, lectures, interviews, and large local audio collections.

If you need bulk audio compression, batch MP3 compression, WAV or FLAC size reduction, AAC, Opus or OGG compression, and a simple M4A compressor for Android — InBAC brings it all together in one fast and easy-to-use tool.

Less storage. Less manual work. More control over your audio files.