On Wed, 8 Nov 2017 19:15:05 +1100 Stephen Morris <samorris@xxxxxxxxxxxxxxx> wrote: > Hi stan, Ed replied in another thread that he found some info that > says that Logitech software is required to get the functionality > which is not available for Linux, so it looks like surround won't > work. > > I issued the command aplay -Lv and I've put the output below. The > output snippet I've supplied seems to be indicating that it thinks > the headset is capable of surround sound, but I'm not sure if I'm > interpreting the information correctly. > > > sysdefault:CARD=Headset > G533 Gaming Headset, USB Audio > Default Audio Device > front:CARD=Headset,DEV=0 > G533 Gaming Headset, USB Audio > Front speakers > surround21:CARD=Headset,DEV=0 > G533 Gaming Headset, USB Audio > 2.1 Surround output to Front and Subwoofer speakers > surround40:CARD=Headset,DEV=0 > G533 Gaming Headset, USB Audio > 4.0 Surround output to Front and Rear speakers > surround41:CARD=Headset,DEV=0 > G533 Gaming Headset, USB Audio > 4.1 Surround output to Front, Rear and Subwoofer speakers > surround50:CARD=Headset,DEV=0 > G533 Gaming Headset, USB Audio > 5.0 Surround output to Front, Center and Rear speakers > surround51:CARD=Headset,DEV=0 > G533 Gaming Headset, USB Audio > 5.1 Surround output to Front, Center, Rear and Subwoofer speakers > surround71:CARD=Headset,DEV=0 > G533 Gaming Headset, USB Audio > 7.1 Surround output to Front, Center, Side, Rear and Woofer > speakers iec958:CARD=Headset,DEV=0 > G533 Gaming Headset, USB Audio > IEC958 (S/PDIF) Digital Audio Output That's how I would interpret it. I also have a usb sound device, and I get that 7.1 entry, so it might just be generic to usb. It's easy to check. Run the command aplay -lv and it should give you the subdevice to access the 7.1 on the headset, as counter intuitively a device [digit] output. e.g.card 2: Revolution51 [M Audio Revolution-5.1], device 1: ICE1724 IEC958 [ICE1724 IEC958] If there isn't one for 7.1 for the headset, then it is just a generic template for usb devices, and you are out of luck. That's what I get for my usb device. If there is one, then put on the headset, and play a wav file with the following command. It has to be wav because aplay doesn't have any decoding logic. You could probably use sox to convert something if you don't have a wav file. aplay -D plughw:0,[subdevice number goes here] [wav file name] e.g. aplay -D plughw:0,6 pretty_song.wav You could try different numbers from 0 through 7 as the second digit, regardless of the aplay results, to see if there is any difference in sound. One of them is likely to be IEC958 output, which is digital, so will not be pleasant on your ears. All that said, I think you are correct that surround won't work. DTS:X will be a head related transfer function (HRTF). Those are complex, so I doubt it is engineered into alsa, though an enterprising coder might have taken it as a challenge. https://en.wikipedia.org/wiki/Head-related_transfer_function _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx
