Life has been a bit busy lately, so I have only just got around to testing RioPlay since Dave included the high quality down sampling code.

I tried it out today, took me a while to get it working as I forgot that the addresses for the stream servers need to be IP addresses rather than names...

It is almost working perfectly now. Most of the nasty effects of down sampling are gone.

However there is still a problem, on the right channel only there is a crackingly sound. There is no problem on the left channel, it sounds perfect.

The MP2 stream in question is 128kb/s sampled at 48khz (the output from a Psion Wavefinder DAB radio). Here is a sample:

http://www.norman.cx/download/rioplay/radio_4_test.mp2

I have checked the following to narrow down the problem:
- the MP2 plays back correctly on every MP3 player on my PC
- the crackingly still exists if I save a chunk of the stream, name it .MP3 and import it into the Rio Audio Receiver server and play it from there
- the crackling is not being caused by my amp/speakers
- the crackling is present on all the streams coming from my Wavefinder
- the crackling is not present on other streams listed in the streams.cfg file (though I suspect they are all MP3 streams)

Do other people see this with this sample ?