Mackie Onyx Satellite firewire freshly dissected : satellite : CODEC AK4528 2ch ADC/DAC 24bit/96k, 8 AOP JRC 4580 (ref 128G) dock : DAC AK4358 8ch DAC 24bit/192k, 6 AOP JRC 4580 (ref 127G)   I should try the dock outs as it should be better thanks to the ak4358 instead of a codec.

I see your point when using analog inputs. Here is a link to benchmark wiki with interesting info to setup I hope : Computer Audio Playback - Setup Guide - Benchmark Benchmark makes professional converters.

For me 3 o'clock is also the level corresponding to direct. It is why I say that it is better to use it at 12 o'clock because as others have measured it is too hot. If it is too hot, you can do some damage to your amp. That is with the old gain, not the new unit. After all, do as you want, I...

I advise to use the volume at 12 o'clock because the bypass level (3 o'clock) is too hot.

Isolation transformers and filters are not snake oil. They only play a part if you have a very high audiophile setup. If you don't believe that, and prefer to believe 'science', these isolation transformers are used in labs for example. But if you don't hear the difference between 44,1kHz and...

Did you check the dc offset for these two opamps ? Why did you choose the LT for the ss out since it is not specific for audio and why not the LM which seems to be very good and specific for audio ? Tahnks for your information.

About the volume question. I prefer to have the max at 3 o'clock. I am strongly interested in the solution presented by ELP FAN, that is use a linear with two more resistors. I have seen this solution in doy projects and think it is a good one. And if we can avoid the knob with clicks...

Here is the Ryan's answer with the detail instructions for changing the gain: Line out gain: Change the below resistors: - R42/43 - It is rated as around 3K Ohm now. - Change it to 2K Ohm or less to reduce the both line out and tube pre out gain. Headphone output gain: - Change...

I need your help about the hum ! I recorded directly (no microphone) the solid state out, the tube out and the headphone out. I talk here only about the solid state out since the others have the same hum. I analysed the record with audacity and here is my finding : At low level...

I also have the hum sound problem. I use a 60 ohm impedance headphone and it is quite annoying to listen to music with the hum. But i understand i can modify some resistors to be able to listen to it. There is still a problem. I tried the tube out on an integrated amplifier. I put the...