hello marcus thanks for your reply,i really read the tx_voice.py ,i am using E310 i set the audio card samp rate to 8KHZ and i did not resamp the 8K of audio samp rate to the GMSK symbol rate
i see that there is s resample block before UHD_TRANSMITTER,resample the code rate from 8K to 100K,and the uhd_transmitter samp rate is 100K but this program do not work well,so i delete this resample block ,and the program work better than before. i think that the code rate into uhd_sink is not match with the samp rate because i see that the uhd will do a Interpolation itself,so i set code rate 100K does match 100K uhd samp rate. i want to ask ,if the uhd_sink samp rate is 100K,what is the code rate that is ok ? --Ekko
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