Sakura Taisen 2 - Disabling the DSP makes the guitar sound extremely loud

[kihato]

Platform / OS / Hardware:
Windows11 / i7-10700F / GTX 1660 SUPER

Flycast version: v2.4-23-gd259a2e2f

If DSP is enabled there is no problem.

Sakura.Taisen.2.mp4

[flyinghead]

When the DSP is disabled, the audio channels that are processed by the DSP are instead mixed in with the other channels. This is required to avoid missing sounds when the DSP is disabled.
The resulting volume level used to be too high for these sounds but this was fixed a while ago.

In this case, it's likely that the guitar sound is attenuated when processed with the DSP, but obviously not when it's disabled.