canadian and expressvu sound?

jeapel · 17th July 2005, 01:01 PM

hi

The canadian expressvu music channel 900->999 are
supposed to be a cd quality but when i switch between
my cd player and expressvu(2700)my cd player is for me
better.

Did you found the same thing like me ?

thanks

leadbelly · 17th July 2005, 03:57 PM

The problem is not likely the source but your receiver. Unfortunately, there is little you can do with the 2700.

What is this circuit element?

jeapel · 17th July 2005, 04:23 PM

ok the 2700 is the cheap sound model :-) and have you
succeed with your test on 3100

maybe next autumn in canada with satellite radio
will be a good update ??? for sound quality

thanks

Mikett · 17th July 2005, 04:48 PM

I use an Expressvu VDSL terminal and use the AC3 connection to my external DAC. The internal DAC in the set top terminals are not that great quality. In fact, on some channels it would overdrive the input stage on the analog out, producing tremendous clipping type distortion yet be distortion free via the external DAC.

jeapel · 17th July 2005, 07:46 PM

a external DAC good idea Mikett but your distortion
problem confirm my opinion for the sound of
expressvu :-(

i have no digital output on my 2700 but i would like
to get details of your setup

-what kind of digital signal is AC3 PCM or ?? or special modulation

-your chip ic number DAC

-if i change my box for 3100 is it possible to get the same setup

thanks

leadbelly · 17th July 2005, 08:35 PM

Quote:

Originally posted by jeapel
-if i change my box for 3100 is it possible to get the same setup

As Mikett is undoubtedly talking about one of the receivers with built in Dolby reception, then no, you can never get this with a 3100. As was stated in that thread I linked to, if you do the Toslink hack on the 3100, you can get 2 channel stereo PCM out of it. Of course it will work with an external DAC; that is my setup: by using the digital connection my surround receiver is doing the D/A conversion and not the DAC in the 3100.

Mikett · 17th July 2005, 08:44 PM

I still haven't figured out the details of what signals are carried by ExpressVU's VDSL ( Video via fiberoptics/phonelines). Some signals are AC3 and some just PCM. My terminal is a Motorola one but I'm sure the raw signal is the same as satellite feed.

jeapel · 17th July 2005, 09:14 PM

it s a good project for next winter :-)

i m newbie with AC3 but if i understand
AC3 and dolby are the same thing

leadbilly you get 2 pcm out but is it possible to do:

1-a digital converter from PCM to PWM

2-a digital PWM amplifier

3-a L/C dac just before speaker

maybe the sound would be very good with 0% distorsion
because all digital

17th July 2005, 01:01 PM	#1
jeapel diyAudio Member Join Date: Sep 2003 Location: quebec	canadian and expressvu sound? hi The canadian expressvu music channel 900->999 are supposed to be a cd quality but when i switch between my cd player and expressvu(2700)my cd player is for me better. Did you found the same thing like me ? thanks

17th July 2005, 03:57 PM	#2
leadbelly diyAudio Member Join Date: Dec 2002 Location: Calgary, Alberta	The problem is not likely the source but your receiver. Unfortunately, there is little you can do with the 2700. What is this circuit element? __________________ Aerodynamics are for people who can't build engines. Enzo Ferrari

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17th July 2005, 04:23 PM	#3
jeapel diyAudio Member Join Date: Sep 2003 Location: quebec	ok the 2700 is the cheap sound model :-) and have you succeed with your test on 3100 maybe next autumn in canada with satellite radio will be a good update ??? for sound quality thanks

17th July 2005, 04:48 PM	#4
Mikett diyAudio Member Join Date: Aug 2003 Location: Toronto	I use an Expressvu VDSL terminal and use the AC3 connection to my external DAC. The internal DAC in the set top terminals are not that great quality. In fact, on some channels it would overdrive the input stage on the analog out, producing tremendous clipping type distortion yet be distortion free via the external DAC.

17th July 2005, 07:46 PM	#5
jeapel diyAudio Member Join Date: Sep 2003 Location: quebec	a external DAC good idea Mikett but your distortion problem confirm my opinion for the sound of expressvu :-( i have no digital output on my 2700 but i would like to get details of your setup -what kind of digital signal is AC3 PCM or ?? or special modulation -your chip ic number DAC -if i change my box for 3100 is it possible to get the same setup thanks

17th July 2005, 08:44 PM	#7
Mikett diyAudio Member Join Date: Aug 2003 Location: Toronto	I still haven't figured out the details of what signals are carried by ExpressVU's VDSL ( Video via fiberoptics/phonelines). Some signals are AC3 and some just PCM. My terminal is a Motorola one but I'm sure the raw signal is the same as satellite feed.

17th July 2005, 09:14 PM	#8
jeapel diyAudio Member Join Date: Sep 2003 Location: quebec	it s a good project for next winter :-) i m newbie with AC3 but if i understand AC3 and dolby are the same thing leadbilly you get 2 pcm out but is it possible to do: 1-a digital converter from PCM to PWM 2-a digital PWM amplifier 3-a L/C dac just before speaker maybe the sound would be very good with 0% distorsion because all digital

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