On 23/06/10 18:49, James Courtier-Dutton wrote:
On 22 June 2010 13:58, Sid Boyce<sboyce@xxxxxxxxxxxxxxxx> wrote:
I have an application using the on-board sound card mic which should send
it's data to the USB card for relay to a Sofweare Defined Radio as 2
quadrature signals digital (I/Q) for transmission.
On the receiving side it can take data from the Radio at up to 192K sample
rate --> program --> Speaker on the on-board sound card - that works fine.
Transmit fails, dmesg output with 48K sample rate set is:-
[509686.177169] ALSA sound/usb/clock.c:214: 6:2:3: endpoint lacks sample
rate attribute bit, cannot set.
[509686.187920] ALSA sound/usb/clock.c:214: 6:2:1: endpoint lacks sample
rate attribute bit, cannot set.
[509686.266905] ALSA sound/usb/mixer.c:2051: status interrupt: c0 0e
[509686.330901] ALSA sound/usb/mixer.c:2051: status interrupt: c0 0e
[509686.353775] ALSA sound/usb/clock.c:214: 6:2:7: endpoint lacks sample
rate attribute bit, cannot set.
[509686.394898] ALSA sound/usb/mixer.c:2051: status interrupt: c0 0e
[509686.458886] ALSA sound/usb/mixer.c:2051: status interrupt: c0 0e
[509686.522874] ALSA sound/usb/mixer.c:2051: status interrupt: c0 0e
[509823.078594] ALSA sound/usb/clock.c:214: 6:2:3: endpoint lacks sample
rate attribute bit, cannot set.
[509823.091571] ALSA sound/usb/clock.c:214: 6:2:1: endpoint lacks sample
rate attribute bit, cannot set.
[509823.146811] ALSA sound/usb/mixer.c:2051: status interrupt: c0 0e
[509823.202679] ALSA sound/usb/clock.c:214: 6:2:7: endpoint lacks sample
rate attribute bit, cannot set.
[509823.210807] ALSA sound/usb/mixer.c:2051: status interrupt: c0 0e
[509823.274792] ALSA sound/usb/mixer.c:2051: status interrupt: c0 0e
[509823.338782] ALSA sound/usb/mixer.c:2051: status interrupt: c0 0e
[509823.402783] ALSA sound/usb/mixer.c:2051: status interrupt: c0 0e
Regards
Sid.
--
This device uses a global clock rate according to the data sheets.
So, record rate must equal playback rate.
sample_rate = 48000 # ADC hardware sample rate in
Hertz receive from the radio.
name_of_sound_capt = "hw:2" # E-MU 0404 USB audio as IQ
capture (Receive)
name_of_sound_play = "hw:0" # HDA Intel on-board to Speakers.
channel_i = 1 # Soundcard index of in-phase
channel: 0, 1, 2, ...
channel_q = 0 # Soundcard index of quadrature
channel: 0, 1, 2, ...
# TX I/Q Generation for Softrock
name_of_mic_play = "hw:2" # E-MU 0404 USB audio for IQ
output sent to the Radio for transmit (Mic --> program --> E-MU -->
transmitter).
mic_playback_rate = 48000
mic_play_chan_I = 1
mic_play_chan_Q = 0
microphone_name = "plughw:0" # HDA Intel on-board sound
mic_channel_I = 0 # Soundcard index of mic audio
channel
mic_channel_Q = 1 # Soundcard index of ignored channel
mic_sample_rate = 48000 # Microphone sample rate in Hertz
mic_max_sample = 25535
add_imd_button = 1
All sample rates set to 48K.
Regards
Sid.
--
Sid Boyce ... Hamradio License G3VBV, Licensed Private Pilot
Emeritus IBM/Amdahl Mainframes and Sun/Fujitsu Servers Tech Support
Specialist, Cricket Coach
Microsoft Windows Free Zone - Linux used for all Computing Tasks
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