On 11/27/2013 08:37 AM, Alexander E. Patrakov wrote: > David Henningsson wrote: > > (sorry for hijacking the thread) > >> The current logic hard codes the port names of headphones, headset and >> headphone mic. > > I think there is one more functional requirement likely to appear in the > future. Namely, at LCE 2013, we discussed a reimplementation of > module-virtual-surround using IIR filters (that I still have to clean up > before submission), and Tanu suggested that it should be activated by > default for headphones, which, from my viewpoint, is reasonable. After > that discussion, some complications appeared: > > * My desktop PC has a Gigabyte H87N-WIFI board that allows for > headphones to be plugged into the front panel. However, the Streacom FC8 > Evo case does not have the headphone jack on the front panel at all, so > I have to plug them into the rear jack. This sounds like a completely different problem. I'm just guessing since you didn't provide any alsa-info or similar info, but if you want your rear jack to work as a headphone jack instead of a line-out jack, use hda-jack-retask to do this on ALSA level. Then PulseAudio would pick that up correctly. (Assuming you run a recent kernel and PA version.) > * I also have a set of filter coefficients that produce "virtual > headphone" effect from 2.0 laptop speakers, which, combined with the > above filter, allows for much better downmixing of 5.1 audio for such > speakers. The caveat is: this currently works only for 13" laptops. > Other laptop sizes need different coefficients. So, in the very unlikely > case if I clean up the coefficient-generation program for submission and > if someone generates more coefficients for me, then we might need a rich > vocabulary for "stereo" speakers: traditional properly-placed stereo > speakers, 17" laptop, 13" laptop, 32" TV on a stand, 47" wall-mounted > TV, and so on. But, as I said, it is much more likely that I will not > submit this at all due to lack of time - so please don't take this as > something to consider immediately. Ok, I will not consider this. :-) -- David Henningsson, Canonical Ltd. https://launchpad.net/~diwic
