shifting sample pitch too high crashes sfizz

[mrbumpy409]

Overview

Using an envelope to shift the pitch of a sample too high crashes sfizz (and brings down the whole DAW as well, in my case). I discovered the bug while trying to create a sine wave sweep across the entire frequency range. The sweep works great when played at note C1 (with middle C = C4), but notes higher up the keyboard cause sfizz to crash.

Steps to Reproduce

1. Download and extract pitch shift crash.zip.
2. Load frequency_sweep.sfz into sfizz.
3. Play note F2 or higher.

Actual Result

sfizz crashes, and possibly also brings down the DAW (in my case, REAPER also crashes). If I launch REAPER from the command line, I get the following text output when sfizz crashes:

Assert failed: !hasNanInf(buffer.getConstSpan(0))
Assert failed at /usr/src/packages/BUILD/library/src/sfizz/Voice.cpp:1352
Trace/breakpoint trap (core dumped)

Expected Result

sfizz shouldn't crash.

Additional Information

• OS: KDE neon 6.2 (based on Ubuntu 24.04)
• sfizz version: 1.2.3
• DAW: REAPER v7.33
  • Audio driver: JACK / Pipewire
  • Audio sample rate: 48000 Hz