Re: Controlling and reading a usb radio

[Vincent P. <plr...@gm...>]

Le dimanche 13 mai 2012 06:29:44, Deron a écrit :
> But
> 
> arecord -D "plughw:CARD=Radio" -f cd >audio.raw
> 
> Give me static. Ok, but a simple little program using hidapi appears to
> set the freq, but all I get are "clicks" in the arecord output that
> conincide with the attempts to change the frequency. I even tried
> looping through all frequencies every ten seconds but no go.

FWIW, I have a similar experience with a radio part on a PCI tv card. When I 
enable FM tuner and loop the card's audio dev to speakers, I get static-ish 
noise... Until I switch the FM off, at which point I get perfect audio until 
some buffer runs out of data (ie, half a second, by hear).
I suspect there is a bug in some ring buffer access, where writing would 
overwrite not-read-yet data, or where updating write pointer would interfere 
with read pointer. But I'm not sure where to look.

-- 
Vincent Pelletier