On 20/09/15 03:43, Tomas Härdin wrote: > Couldn't you do further low-pass filtering in software, then decimate to > 8 kHz? (caveat: I haven't checked if the code actually does this)
That's exactly what it does. It samples at 16kHz from the ADC, filters it to produce an 8kHz stream. Actually a thought just occurred, could we just do nearest-neighbour upsampling to get back to 16kHz? I'll admit I havent looked at what algorithm is used to do the resampling, however this is not a device that will be used by audiophiles (it doesn't do 192kHz 32-bit FLAC for starters) so linear interpolation or nearest-neighbour would probably work for getting it back to 16kHz. -- Stuart Longland (aka Redhatter, VK4MSL) I haven't lost my mind... ...it's backed up on a tape somewhere. ------------------------------------------------------------------------------ _______________________________________________ Freetel-codec2 mailing list Freetel-codec2@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freetel-codec2
