On Sat, 2009-08-22 at 18:50 +0700, arif setiawan wrote: > Hi, > > We are working on audio processing (encryption-decryption) and audio will be > sent using radio. > > Our configuration is : > > Audio source - ALSA audio in - encryption - ALSA audio out - transmission > over radio (now we still use audio cable) - ALSA audio in - decryption - > ALSA audio out - speaker. > > So data will be sent through radio channel and its converted to analog form > by ALSA PCM during playback. We want to solve synchronization issue by using > data header so that we can decrypt correct data block. So far we still > unable to verify that data we received in the decryption side is similar to > data that we sent from encryption box. Supposed that we filled buffer in > encryption box with some values, when we check buffer in decryption box, we > can't get same data. Our guess that data somehow changed in > digital-analog/analog-digital conversion or we might make mistakes in > filling the buffer so data is not compatible with ALSA PCM. > > Any suggestion to solve this problem? Are you trying to say that you broadcast a digital data over an analog channel, and expect it to be unchanged, without any form of encoding, error correction, etc...? This is crazy! Best regards, Maxim Levitsky _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
