Audio Doesn't Play

[violettharin]

Acknowledgement

• I have read Getting-Started and FAQ
• If dealing with version 0.1.549 or higher, you have installed the .NET 8 runtime

🐛 Describe the bug

So basically, there's no audio playing. The tempo marker runs fine, but nothing is actually playing, not even audio I import myself. Even the voicebanks on different projects, which worked just fine before, are also not playing, but the tempo markers work as if there's audio. The notes are also not playing their preview audio.
I tried looking for the mixer in my computer, but OpenUTAU doesn't show up in the mixer, and it's not a voicebank exclusive bug, as even audio i drag from my computer into the track does not play.
I'm pretty sure I have all the correct phonemizers, cuz the voicebanks worked until like- yesterday or 2 days ago, where I opened the software and suddenly everything's silent

Explains how to reproduce the bug

It simply happens. Any project I've made in the past, when opening it now, also lacks audio

OS & Version

Windows 10

Logs

2026-06-24 11:19:05.639 -03:00 [INF] Loaded C:\Users[me]\Desktop[me]\musiquinha\hello hellhole seila.mp3 00:00:05.3294075
2026-06-24 11:19:07.331 -03:00 [INF] Built peaks C:\Users[me]\Desktop[me]\musiquinha\hello hellhole seila.mp3 00:00:01.6910843
2026-06-24 11:19:09.241 -03:00 [INF] undoGroup started
2026-06-24 11:19:09.241 -03:00 [INF] Loading Singer: 欲音ルコ♀歌連続音統合版forOU_Ver.1.00
2026-06-24 11:19:09.241 -03:00 [INF] ExecuteCmd Change singer
2026-06-24 11:19:10.685 -03:00 [INF] ExecuteCmd Change phonemizer
2026-06-24 11:19:10.686 -03:00 [INF] Publish notification Voice color remapping.
2026-06-24 11:19:10.686 -03:00 [INF] undoGroup ended
2026-06-24 11:19:10.686 -03:00 [INF] SchedulePreRender
2026-06-24 11:19:10.686 -03:00 [INF] Publish notification Pre-render notification.
2026-06-24 11:19:16.111 -03:00 [INF] StartPlayback at 00:00:00
2026-06-24 11:19:25.846 -03:00 [INF] StartPlayback at 00:00:00
2026-06-24 11:19:32.934 -03:00 [INF] Autosave C:\Users[me]\Documents\OpenUtau\Backups\Untitled-autosave.ustx.
2026-06-24 11:19:32.934 -03:00 [ERR] Failed to autosave: C:\Users[me]\Documents\OpenUtau\Backups\Untitled-autosave.ustx
System.ArgumentNullException: Value cannot be null. (Parameter 'relativeTo')
at System.ArgumentNullException.Throw(String paramName)
at System.IO.Path.GetRelativePath(String relativeTo, String path, StringComparison comparisonType)
at OpenUtau.Core.Ustx.UWavePart.BeforeSave(UProject project, UTrack track) in D:\a\OpenUtau\OpenUtau\OpenUtau.Core\Ustx\UPart.cs:line 412
at OpenUtau.Core.Ustx.UProject.BeforeSave() in D:\a\OpenUtau\OpenUtau\OpenUtau.Core\Ustx\UProject.cs:line 140
at OpenUtau.Core.Format.Ustx.AutoSave(String filePath, UProject project) in D:\a\OpenUtau\OpenUtau\OpenUtau.Core\Format\USTx.cs:line 117
2026-06-24 11:19:32.934 -03:00 [INF] Autosaved C:\Users[me]\Documents\OpenUtau\Backups\Untitled-autosave.ustx.
2026-06-24 11:20:02.943 -03:00 [INF] Autosave skipped.
2026-06-24 11:20:32.945 -03:00 [INF] Autosave skipped.
2026-06-24 11:21:02.956 -03:00 [INF] Autosave skipped.
2026-06-24 11:21:05.524 -03:00 [INF] StartPlayback at 00:00:00
2026-06-24 11:21:07.716 -03:00 [INF] StartPlayback at 00:00:00
2026-06-24 11:21:16.709 -03:00 [INF] undoGroup started
2026-06-24 11:21:16.709 -03:00 [INF] ExecuteCmd Change BPM from 100 to 120
2026-06-24 11:21:16.709 -03:00 [INF] undoGroup ended
2026-06-24 11:21:16.709 -03:00 [INF] SchedulePreRender
2026-06-24 11:21:16.709 -03:00 [INF] Publish notification Pre-render notification.

[lolnbjnv21331]

I'm trying to make them sing but they won't 'cause I tap play but it's not working

[SirHonkkk]

try going to Tools>Preferences>Playback and select the output device you want to use.

[ANG3Lwoahh]

Mine says "Failed to Render" when i press the space bar to hear my music. How do i fix this 😭