Digital Sound and Recievers
johnnyamerika
Posts: 382
Hi all,
I have an Onkyo 595, and I've noticed on this and many other recievers an issue with the digital sound inputs.
I have 2 optical and 2 coaxial digital inputs that are all assignable. I have 4 modes that accept the inputs, DVD, Video 1, 2 and 3. I noticed that certain inputs, i.e. OPT 1, COA 1... sound better on different modes. For example, OPT 1 sounds best when placed on Video 2; on any other mode it starts losing volume (some more than others).
Has anyone experienced this, and do they know why it occurs?
Thanks,
John
I have an Onkyo 595, and I've noticed on this and many other recievers an issue with the digital sound inputs.
I have 2 optical and 2 coaxial digital inputs that are all assignable. I have 4 modes that accept the inputs, DVD, Video 1, 2 and 3. I noticed that certain inputs, i.e. OPT 1, COA 1... sound better on different modes. For example, OPT 1 sounds best when placed on Video 2; on any other mode it starts losing volume (some more than others).
Has anyone experienced this, and do they know why it occurs?
Thanks,
John
Post edited by johnnyamerika on
Comments
tough 1 here man!
HBomb
DVD - coax 1 works best
Vid 1 - coax 2 works best
vid 2 - opt 1 works best
vid 3 - opt 2 works best
Wierd.
John
Wierd it is...
HBomb
find anything out???????????
HBomb
Maurice
Receiver: Harman/Kardon HK3390
Speakers: Polk Audio RT1000p
"I would rather have a cup of tone than an ocean of power" **Dr. Harvey Rosenberg**
Are you switching between any DSP modes or 2/5ch stereo modes?
I think there is a DB difference in analog and digital signals when being sent out from source components as well. It's not a problem as far as I know.
I'm stumped.
YES!
Are you comparing 2 channel with 2 channel and dd with dd?
If we stay with 2 channel,(CD Redbook is I believe 16 bit and HDCD is 20 bit), the TTL out is a PCM scheme out @ 44.1 Khz into the dac. Looking at any of the inputs into your avr there should be no delta in losses and the output level should be the same.
If we input the the analog out, from a cd player, then apply prologic or logic 7, within the avr for simulated multi channel then you will hear losses.
I have been experimenting with external dacs and have found that my h/k 520 does not do the same high quality conversion of Redbook or DTV PCM input. With that said I have also noted that the analog out from the external dac then into the h/k sounds worlds better when applying the prologic or logic 7 processor in the h/k.
This most definetly is an interesting hobby!
HBomb
So is there more to rating a DAC besides the bit conversion rate? Do quality of parts come into play?
OH Yes, and I have been struggling to figure it all out.
Higher bit rate means more accurate replication of the original signal. example over a simple SIN wave is if it were 2 bit then there would be 2^^2 or 4 voltages for replication. 3 bit would be 2^^3 and so on up to 20bit.
Clocking circuits have to be extremely accurate and if not the output stage to analog can kill us. In higher end DAC's the power supplies, chip sets, clocking and analog stages are always isolated. There is so much to talk about here it could drive ya nuts.
HBomb
When your eyes are bleeding from that stuff then go deeper.
I'd hold off buying source material untill you feel you have exausted the Web.
Much talk about seperates has transpired on the forum lately and I believe that having the DACs isolated from the rest of the components is really the way to go. The problem is that this a very expensive way to go and frankly speaking I don't think there are huge benefits from a HT standpoint.
For the 2 channel world I feel this is the only way to go. For example playing cd's the benifits of seperate transport, dac, preamp and amp will provide the best power isolation possible and yield a beautifull stereo image. When I finish that part of my system I think I'll look into the LSI series but till then I'll just keep adding.
These are just my thoughts and I hope I'm not beat about the head, neck, and chest too bad.
HBomb