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wifiaudio:start
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wifiaudio:start [2015/12/23 15:24] tschulz [Raspberry Pi Issues] |
wifiaudio:start [2018/11/12 14:01] (current) tschulz [Transmitter] |
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| * Obviously some sort of tcp/ip must be running to for the netcat communication to work. | * Obviously some sort of tcp/ip must be running to for the netcat communication to work. | ||
| + | ===== Wifi Setup ===== | ||
| + | |||
| + | <file bash /etc/network/interfaces> | ||
| + | ... | ||
| + | auto wlan0 | ||
| + | iface wlan0 inet dhcp | ||
| + | wpa-ssid ssid | ||
| + | wpa-psk #### | ||
| + | |||
| + | ... | ||
| + | </file> | ||
| + | |||
| + | ===== Audio setup ===== | ||
| + | |||
| + | * By default the usb audio adapter is detected as card 1 not card 0(default). I tried disable the bcm sound module but for some reason that disables the mixer of the usb audio adapter. | ||
| + | * I was able to set the default card using asound.conf | ||
| + | |||
| + | <file bash /etc/asound.conf> | ||
| + | pcm.!default { | ||
| + | type hw | ||
| + | card 1 | ||
| + | } | ||
| + | |||
| + | ctl.!default { | ||
| + | type hw | ||
| + | card 1 | ||
| + | } | ||
| + | </file> | ||
| ====== Receiver ====== | ====== Receiver ====== | ||
| Line 17: | Line 45: | ||
| PORT="8080" | PORT="8080" | ||
| - | RATE="5" | + | RATE="2" |
| - | BUFFER="50" | + | BUFFER="10" |
| FORMAT="cd" | FORMAT="cd" | ||
| Line 33: | Line 61: | ||
| PORT="8080" | PORT="8080" | ||
| - | RATE="5" | + | RATE="2" |
| - | BUFFER="50" | + | BUFFER="10" |
| FORMAT="cd" | FORMAT="cd" | ||
| Line 42: | Line 70: | ||
| arecord -B ${BUFFER} -r ${RATE} -f ${FORMAT} | netcat ${RECV_ADDR} ${RECV_PORT} | arecord -B ${BUFFER} -r ${RATE} -f ${FORMAT} | netcat ${RECV_ADDR} ${RECV_PORT} | ||
| </file> | </file> | ||
| + | |||
| + | ====== Audio Passtrough ====== | ||
| + | * Check mixer controls for input ampifcation if clipping occurs | ||
| + | <file> | ||
| + | arecord -f S16_LE -c2 -r48000 -f dat | aplay -f S16_LE -c2 -r48000 -f dat | ||
| + | </file> | ||
| + | |||
| ====== Price List ====== | ====== Price List ====== | ||
| Line 55: | Line 90: | ||
| ====== Raspberry Pi Issues ====== | ====== Raspberry Pi Issues ====== | ||
| - | * I get this error whenever I try to change either the buffer size, buffer time, or interrupt period on both the R Pi 1 and R Pi 2<file>aplay: set_params:1305: Can't use period equal to buffer size (256 == 256)</file>I'm going to try to use a USB Audio adapter to bypass the issue. Without changing this parameter the audio delay is just too high to be practical. | + | * I get this error whenever I try to change either the buffer size, buffer time, or interrupt period on both the R Pi 1 and R Pi 2<file>aplay: set_params:1305: Can't use period equal to buffer size (256 == 256)</file> |
| + | * I picked up a C-Media CM108 Chipset usb audio adapter and it fixed the problem. I able to adjust the sample and buffer size [[http://www.amazon.com/External-Adapter-Windows-Drivers-Needed/dp/B00V9E9YRG|Link]] | ||
| + | ====== Other Notes ====== | ||
| + | * The "Chip" microcomputer looks really promising it includes storage, wifi, and audio all on board and is selling for $9. Their website says they will be shipping in June 2016 [[http://getchip.com/]] | ||
wifiaudio/start.1450905883.txt.gz · Last modified: 2015/12/23 15:24 by tschulz
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