Magsy
100+ Head-Fier
- Joined
- Nov 9, 2004
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Right I've been busy and got a load of rmaa results on this! I've done a battery vs usb power comparison
I'm a RMAA n00b, but I think I got it figured. When I changed sample rate I also changed it in Patchmix to match. Everything seemed to work ok, even if it didn't it doesn't matter, it was the same for either the usb power or battery power tests so they are vaild to compare.
I used the emu0404 to record with, I couldn't test loopback because I don't have enough adaptors..
My dac has all the trimmings, the axial inductor and blackgates.
First we have the battery power tests which are here!
It doesn't look too bad to me, way better than onboard sound so I'm happy
I tired the test with two aa's but it didn't happen, voltage was too low to make the tests at 48khz work (white noise) so instead I used 4 aa's which measured at 5.25v. On 2 aa's (2.65v) the volume was considerably less than usb power or 4 aa's, I had to adjust 5db more in patchmix to get the level up for Rightmark.
Here we have results for usb power!
It looks worse than it is and in listening it doesn't sound too bad, I couldn't really tell them apart to be honest apart from infrequent HD noise. That said it is a fairly big gap performance wise...I am wondering if I should go back back on my plans and use battery power now.
I have a comparision of the two here so you can see the results side by side.
I'll try to get some results via my laptop tomorrow to see if power is cleaner there.
I'm a RMAA n00b, but I think I got it figured. When I changed sample rate I also changed it in Patchmix to match. Everything seemed to work ok, even if it didn't it doesn't matter, it was the same for either the usb power or battery power tests so they are vaild to compare.
I used the emu0404 to record with, I couldn't test loopback because I don't have enough adaptors..
My dac has all the trimmings, the axial inductor and blackgates.
First we have the battery power tests which are here!
It doesn't look too bad to me, way better than onboard sound so I'm happy
I tired the test with two aa's but it didn't happen, voltage was too low to make the tests at 48khz work (white noise) so instead I used 4 aa's which measured at 5.25v. On 2 aa's (2.65v) the volume was considerably less than usb power or 4 aa's, I had to adjust 5db more in patchmix to get the level up for Rightmark.
Here we have results for usb power!
It looks worse than it is and in listening it doesn't sound too bad, I couldn't really tell them apart to be honest apart from infrequent HD noise. That said it is a fairly big gap performance wise...I am wondering if I should go back back on my plans and use battery power now.
I have a comparision of the two here so you can see the results side by side.
I'll try to get some results via my laptop tomorrow to see if power is cleaner there.