Originally Posted by wtaylorbasil
I am searching for help on this one for sometime now. I hope I will have a few good responses.
I bought the Onkyo TXNR609 (TI Burr-Brown 192 kHz/24-Bit DACs on all channels 32-Bit DSP chip for advanced processing) because it has a USB input to be able to playback FLAC files.
1. I am disappointed to find that the play back of the ripped FLAC (44.1/16), via USB into Receiver, is not as good as the original CD.
Unless your extraction is absolute pants the digital data on the FLAC will actually be a bit (ha ha) better than a real-time CD playback as it has done better error checking, your accuracy checks just mean that 2 other people have submitted the same data including checksum to Accuraterip, your DVD-RAM drive is far from the worst out there ( it is a awful drive in some resepcts , I have one of them on an old Toshiba, but in extraction terms it is competent enough) and EAC will tell you exactly what the quality of your rip is , anything above 98% is as good as you need, EAC is very picky, a 99% rip will play back with no audible problems. So I would not rush to replace it just yet !
2. My equipment: LG HL-DT-ST DVDRAM GMA-4020B ripping drive, Cambridge Audio 650BD DVD/CD player, Onkyo TXNR609 Receiver (with USB input can only plays up to 96/24 FLAC files via USB).
What actually remains to be established is if you really do hear a fundemental difference.
Can you switch seamlessly between the two sources, if so you need to sync them so you can do rapid switching, you may find that the difference is gone.
I assume that you are taking the digital feed from the DVD/CD player. The single most frequent cause of perceived differences between digital sources is output level.
You are dealing with two senders and two receivers there are therefore 4 places where a difference could theoretically occur. I own a digital streaming audio device that does not output a bit-perfect stream, instead for whatever reason the playback is hotter ( I measured this) by about 1db c/f other digital playbacks , this bizarre effect sometimes means I get clipping on hot tracks.
Assuming both your CD/DVD player and computer output an accurate bit-stream they then pass into different receivers (USB and SPDIF) , the receivers will unpack the data and then decode it. Now, if both receivers send the same unpacked PCM data to a single DAC common stage then they should both be the same, however if they do their jobs independently then it is possible that they can output analog data that is at slightly different levels and a difference of only 0.3 to 0.5db is enough to be perceptily different.
This is easy to test. Take an analog output from the Receiver such as tape-out and record it via an ADC. Do this for both devices and then you can compare the waveforms. A fundamental dfference will show up quite plainly. I've got a USB ADC I am not using at the moment, send me a PM and I'll wing it to you...