Can JMF support 13 bit uniform PCM ?

Hi everyone,
I want to play AMR RTP stream in JMF, now, I got 13bit uniform PCM in a short array after using amr decoder, but seems Jmf can't play this 13 bit uniform PCM directly. so , I tried converting these PCM to U law PCM ,and tried A law PCM also, but the sounds still cann't play well? Doesn't someone know how to play these 13 bit uniform PCM in JMF ?
Thank you very much!

@? In answer to my own question, and I think I had known this a while back, SPDIF standard only supports transmission of either 2 channel PCM (uncompressed) stereo with up to 24 bit resolution per channel and up to as much as 92 kHz sampling frequency, or compressed (DD or DTS) multichannel audio up to 5..
Since each frame of SPDF is 64 bits in length (with a single sample of L and R channels plus extra bits of status in each frame), at 92 kHz max sampling rate, this translates to about 3 Mbits/sec bit rate. However most SPDF don't support the 92 kHz rate (which for 24 bit would be the stereo rate for DVD-Audio) for various copyright protection reasons.
Here is short demonstration of SPDIF transmission of 24bit/96 kHz between two sound cards with and without "bit accurate for playback" enabled:
? http://www.jensign.com/spdif/

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