Handy 0.9.6 on win11 crashes when transcribing longer recordings with Parakeet

Bug Description

Handy crashes when transcribing longer recordings with Parakeet.

I noticed this during normal use. Looking at the recordings saved on disk:

• 5:49 — transcribed successfully
• 6:17 — Handy crashed

I have seen the same behavior more than once with recordings longer than about 6 minutes.

When this happens, the WAV file is still saved to the recordings folder, but no transcription is created and the recording does not appear in History. Because of that, I cannot retry the transcription from Handy even though the audio file is still there.

I searched the existing issues and found #1332, which looks somewhat related, but I am not sure it is the same issue. I previously ran into a similar long-audio problem with Parakeet in another transcription app. In that case the app did not crash, but longer audio stopped transcribing successfully at around the same duration range.

System Information

App Version: 0.9.6

Operating System: Windows 11, build 26200, 64-bit

CPU: Intel Core i7-9750H @ 2.60 GHz

RAM: 32 GB

GPU: NVIDIA GeForce GTX 1660 Ti, 6 GB Intel UHD Graphics 630

This is a laptop with both integrated and discrete graphics. Windows is configured to use the NVIDIA GPU for Handy.

Handy is using:

• Parakeet TDT 0.6B v3 Q8_0
• transcribe.cpp
• Accelerator: Auto
• Vulkan0 / NVIDIA GeForce GTX 1660 Ti

Logs

I attached the relevant part of the log around the crash.

One of the crashes is visible there. This recording waa litle more that 6 minutes long:

[2026-09-12][06:33:30][handy_app_lib::managers::audio][DEBUG] Microphone stream stopped
[2026-09-12][06:33:30][handy_app_lib::actions][DEBUG] Recording stopped and samples retrieved in 37.3028ms, sample count: 6055200
[2026-09-12][06:33:30][handy_app_lib::managers::transcription][DEBUG] Audio vector length: 6055200
[2026-09-12][06:33:30][handy_app_lib::managers::transcription][DEBUG] transcribe-cpp model 'handy-computer/parakeet-tdt-0.6b-v3-gguf/parakeet-tdt-0.6b-v3-Q8_0.gguf' on 'Vulkan0'
[2026-09-12][06:33:30][handy_app_lib::audio_toolkit::audio::utils][DEBUG] Saved WAV file: "C:\Users\Arthur\AppData\Roaming\com.pais.handy\recordings\handy-1789194810.wav"
[2026-09-12][06:33:31][transcribe_cpp][ERROR] ggml_gallocr_reserve_n_impl: failed to allocate Vulkan0 buffer of size 5469919520

Windows Reliability Monitor also records the crash as:

• Problem Event Name: APPCRASH
• Application: handy.exe 0.9.6.0
• Fault Module: ggml-base.dll
• Exception Code: c0000005

This appears to correspond to the same crash shown in the Handy log.

After that error, the next log entries are from Handy starting again.

The WAV file from that recording is handy-1789194810.wav.