Hm, I'd call that a bug. Throttle should *not* change the behaviour of a system. and especially, it should *not* be required in a hardware rate-limited flow graph.
Would you be as nice as to open a bug on https://github.com/gnuradio/gnuradio/issues ? I'd like to keep track of this. Best regards, Marcus On 17.05.2017 14:18, Fernando wrote: > On 15/05/17 21:57, Cinaed Simson wrote: >> On 05/15/2017 09:50 AM, Fernando wrote: >>> On 15/05/17 05:33, Cinaed Simson wrote: >>>> On 05/14/2017 01:06 PM, Fernando wrote: >>>>> With 8 samples/symbol there was aU and CPU at 94% (I have three AMD >>>>> cores> I have reduced it to 2 s/s as suggested Cinaed, then aU >>>>> dissapear and >>>>> CPU is at 70%, sound is a little better but still intermittent. >>>>> File is sampled at 44100 and with direct connection from wav file source >>>>> to audio sink (everything else disabled) it plays fine >>>> Try turning on the throttle and see what happens. >>>> >>>> >>> it works!!!!!! >>> why???? Should not be limited by the sound card? >>> >>> It report a warning: >>>>>> Warning: This flow graph contains a throttle block and another rate >>> limiting block, e.g. a hardware source or sink. This is usually >>> undesired. Consider removing the throttle block. >>> >>> but it keeps the CPU under 40% and works fine. >>> Even with samples/symbol set to 8 it has go to 95% CPU but it has worked >>> some seconds until it has begun to show aUaU. >>> >>> >>> regards >>> >>> >>> >>> >>> _______________________________________________ >>> Discuss-gnuradio mailing list >>> Discuss-gnuradio@gnu.org >>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >>> >> Don't know. But you can't use a re-sampler because you don't know the >> rate flowing into the audio card. >> >> Try setting the sampling rate to 48 kHz, i.e. set the throttle rate to >> 48 kHz, and then under the properties for the audio sink, use the pull >> down menu and set the audio card to 44.1 kHz. And leave the sps set to 8. >> >> If that works, then try disabling the throttle and setting the sampling >> rate of the audio card to 48 Khz - leaving the sps set to 8. >> >> If it doesn't work try setting the sps to 2, no throttle and audio card >> set to 48 KHz. >> >> Use whatever works - but ideally without a throttle. >> > It work both 2samples/symbol and 8s/s but only with the throtle. (with > 8s/s the system is nearly overloaded, 85-90%CPU) > With throtle and 2s/s system is 60-80% CPU but sound is intermittent. > OK, it works although I don't know why. I'll remember trying a throtle > in other situations if something strange happen > > regards > > > > > > > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
