Procedure:

1. I generate 1KHz sinus -90db test signal with wavosaur 1.0.0.9000.
	File:  "sinus 1kHz -90dB.wav" 
    Format 24-bit mono wav
	Playing with SQ3: OK
	
2.  I encode "sinus 1kHz -90dB.wav" to mp3 with lame 3.97
	command:  lame --preset insane "sinus 1kHz -90dB.wav" "sinus 1kHz -90dB.wav".mp3
	resulting File: "sinus 1kHz -90dB.wav.mp3"
    Format MP3
	Playing with SQ3: strange arthefacts in sound louder then test signal, very weird
	
3.  Now I decide to decode MP3 on PC and play decoded wav file on SQ3.
	I decode "sinus 1kHz -90dB.wav.mp3" on PC with 2 mp3 decoders:
	A. Lame
		command: lame --decode  "sinus 1kHz -90dB.wav.lame.mp3" "sinus 1kHz -90dB.wav.lame.mp3".lame16.wav
		resulting File: "sinus 1kHz -90dB.wav.lame.mp3.lame16.wav"
		Format 16-bit mono wav
		Playing with SQ3: Distorted 1Khz (no dithering), OK for decoder without 24 to 16 bit dithering
	B. Mad 16 bit
		command: >madplay -v -b16 -owav:"sinus 1kHz -90dB.wav.lame.mp3".mad16.wav  "sinus1kHz -90dB.wav.lame.mp3"
		resulting File: "sinus 1kHz -90dB.wav.lame.mp3.mad16.wav"
		Format 16-bit mono wav
		Playing with SQ3: Clean 1Khz with dithering noise, OK for decoder with 24 to 16 bit dithering
	B. Mad 24 bit
		command: >madplay -v -b24 -owav:"sinus 1kHz -90dB.wav.lame.mp3".mad24.wav  "sinus1kHz -90dB.wav.lame.mp3"
		resulting File: "sinus 1kHz -90dB.wav.lame.mp3.mad24.wav"
		Format 24-bit mono wav
		Playing with SQ3: Clean 1Khz without noise just like original file, OK for full 24-bit decoder
		
	Additionaly, I normalized wavs to -6dB to hear diferences without extreme amplification:
	Normalized -6dB wavs:
		"sinus 1kHz -90dB.nor -6dB.wav" 
		"sinus 1kHz -90dB.wav.lame.mp3.lame16.nor -6dB.wav"
		"sinus 1kHz -90dB.wav.lame.mp3.mad16.nor -6db.wav"
		"sinus 1kHz -90dB.wav.lame.mp3.mad24.nor -6dB.wav"
	Of course, to hear how SQ3 play problematic mp3 you must listen SQ3 directly with extreme amplification.

4.	Conclusion
	Built-in MP3 decoder in SQ3 is problematic/flawed with some files, PC MP3 decoders (MAD and Lame) decodes that files correctly.
	Polite request to Sean Adams/Slimdevices: please fix it, best to implement full 24-bit MAD decoder
	as stated on Squeezebox product info web page: http://www.slimdevices.com/pi_squeezebox.html
		# MPEG decoding uses MAD software, widely regarded as the most accurate, most compatible MP3 decoder.
		# High accuracy 24-bit synthesis
		# Supports all MP3 data rates and sample rates, including VBR 
	

5.	Someone please test this procedure on your system, to verify my facts.
	If someone have sound card with s/pdif in please capture output from SQ3 when playing problematic mp3 file
	("sinus 1kHz -90dB.wav.mp3") for further analysis.
	

	
Remarks		
	-all wavs are 44.1KHz
	-all files except normalized are extremly quite, to hear something you must amplify to the max,
    	I use SQ3 on 100% volume + headphone Amp with 11x amplification on Sennheiser HD580
	    please be very carefull when work with maximum volume beacuse you can easily damage your ears/equipment, 
		start with low volume, then gradualy amplify
	-Used free software links:
		Wavosaur free audio editor                          http://www.wavosaur.com/download.php
		LAME 3.97 release                                   http://www.rarewares.org/dancer/dancer.php?f=lame-current
		MADPlay v0.15.2b Command Line mp3 Player/Decoder    http://www.rarewares.org/files/mp3/madplay-0.15.2b.zip

