у меня одного в этой связке выдаёт косяк
amixer -D equal set "01. 31 Hz" 89;
Simple mixer control '01. 31 Hz',0
Capabilities: pvolume
Playback channels: Front Left - Front Right
Limits: Playback 0 - 100
Mono:
Front Left: Playback 89 [89%]
Front Right: Playback 89 [89%]
*** glibc detected *** amixer: double free or corruption (!prev): 0x08bf3768 ***