Midi playback sound is not correct

[hexise]

Version

Media3 main branch

More version details

I'm using the androidx.media3:media3-exoplayer-midi library to play MIDI files, but the audio output sounds thin and lacks richness. In contrast, the Android MediaPlayer plays the same MIDI with much better quality, it's more vivid and accurate.

Is there a way to use a custom SoundFont with ExoPlayer to improve the playback quality?

Devices that reproduce the issue

Galaxy S25 with Android 15

Devices that do not reproduce the issue

No response

Reproducible in the demo app?

Yes

Reproduction steps

I've attached a sample MIDI file that demonstrates the issue.

Expected result

Vivid and accurate sound.

Actual result

Sound is thin and lacks richness.

Media

Tokyo.zip

Bug Report

• [ ] You will email the zip file produced by adb bugreport to [email protected] after filing this issue.