2010/10/4 David Henningsson david.henningsson@canonical.com
Exactly, this is a test tool that checks whether the mixer control names and dB information live up to PulseAudio's expectations. That's the tool's purpose.
What's PulseAudio' s expectation ?
PA 's developer seem expect max_dB of all HDA codec are 0dB
Your alsamixertest program does not test any dB range above 0dB
How does PA handle the mixer control when the dB range of the "Master Front" volume control is -34.5dB to +12dB (e.g. vt1708b HDA codec ) is not live up to PA 's expectation
e.g. No Master Volume Control
http://launchpadlibrarian.net/54333151/Card0.Codecs.codec.0.txt
http://launchpadlibrarian.net/37147347/Card0.Codecs.codec.0.txt
Node 0x16 [Audio Mixer] wcaps 0x20050b: Stereo Amp-In Amp-In caps: ofs=0x17, nsteps=0x1f, stepsize=0x05, mute=1 Amp-In vals: [0x00 0x00] [0x00 0x00] [0x00 0x00] [0x00 0x00] [0x00 0x00] [0x9f 0x9f] [0x97 0x97] Power: setting=D0, actual=D0 Connection: 7 0x10 0x1f 0x1a 0x1b 0x1e 0x1d 0x25