Hi all, I'm still pretty new to my BBB / BBGW (I prefer the BBGW simply because of it's inbuilt wifi - real simple). So, I'm running on a SEED BeagleBone Green Wireless. with Debian / Linux 8 : 2016-06-14. The system is up to date - as of now. I'm running headless via wi-fi ssh on Terminal (Mac Sierra). and I'm trying to add sound playback of mp3 / wav files.
So Far: I've installed / updated alsa and alsa-utils. I've plugged in a standard 10$ USB sound stick form EC Technology - some post suggest I get this one - I'm ambivalent as to the precise device but the smaller the better : https://www.amazon.co.uk/EC-Technology-Adapter-Window-above/dp/B012W70XH8/ref=sr_1_1?ie=UTF8&qid=1486650199&sr=8-1&keywords=EC-Technology+usb+sound+Adapter <https://www.amazon.co.uk/EC-Technology-Adapter-Window-above/dp/B012W70XH8/ref=s9_simh_gw_g107_i1_r?_encoding=UTF8&fpl=fresh&pf_rd_m=A3P5ROKL5A1OLE&pf_rd_s=&pf_rd_r=RBKFTFZABKZBTBRHBR8V&pf_rd_t=36701&pf_rd_p=16f14aeb-bd11-4e9e-8c26-9ca0139074ee&pf_rd_i=desktop> I'm also happy to switch to a new device if there is an even smaller / better / more readily hackable device available - but that's probably for another time - suggestions always welcome though !) I've used 'aplay -l' to confirm the USB device exists : card0:WILINK8_BT... device 0: WILIINK8 ... Subdevices: 0/1 Subdevice #0: subdevice #0 card1: Device [USB Audio Device], device 0: USB Audio [USB Audio] Subdevices: 0/1 Subdevice #0: subdevice #0 I have reconfigured the alsa device file (/usr/share/alsa/alsa.conf) to direct audio to the USB card (defaults.ctl.card 1 and defaults.pcm.card 1) and not the BT module and I can hear pink noise (sound-test) from the connected USB Audio stick & speakers / headphones following an alsa restart / system reboot. I have installed mpg321 and, more recently, madplay. I have dumped some ripped mp3 music files into a 'Music' directory on uSDCard and can hear the output with : mpg321 -g 50 /media/uSDCard/Music/MyMusicTrack.mp3 The sound that I hear appears to be 'clipped'. It is distorted and plays back too fast but with no increase in pitch etc. just like a broken / poor 'phone connection. Initially, I thought the problem may be with the track/file I had copied across & chosen to play, so selected another (no difference). Then I selected and left playing the whole folder (around 12 tracks) whilst I did some research. mpg321 -g 50 /media/uSDCard/Music/* Oddly enough, after a couple of tracks the sound was perfect and I listened to the rest of the selection (maybe 8 or 9 tracks in total) with some satisfaction. I also concluded (incorrectly) that the problem must have been with some of the files having been corrupted during the transfer process. However, when I decided to play the tracks again I note they are ALL suffering from the same clipped / broken / slightly too fast playback problem. I'm delighted to have gotten this far but... frustration... so near and yet so far... I have tried with powered speakers and with a simple headset... (no difference, remains distorted / clipped). I have tried with mpg321 and madplay... (no difference, remains distorted / clipped). Anyways, I'm now pretty sure this is a sampling mismatch / there will be some setting I've missed but, like my opening line said, I'm still pretty new to the BBB / BBGW and I'm unsure as to how to proceed - especially as I'm pretty nervous of taking too many retro-steps and 'playing' with far too little knowledge. I have googled and forum-ed this but find it confusing enough extracting relevant Wheezy / Jessie differences and trying to adapt Raspbian / Debian examples etc... anyways... I'm lost... Apologies for the length of this post but too much info is generally better than way too little... I hope... Thanks for reading, hope you can give me some pointers. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/88a79ba0-5860-48ec-acbe-b1e1703b576b%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
