Q: Does Record's mixer alter the signal frequency in any way when using the default audio path? (i.e. does the mixer change or "color" the sound, making it better or worse?)
A: No. Tests have demonstrated that the basic audio path of Record is "ruler flat". Input equaled output with absolutely no variation.
A frequency-rich test file consisting of computer-generated Shepard Tones (Shepard-Risset glissando) was loaded into an NN-XT Advanced Sampler. This audio test file sweeps through the entire audio spectrum with 7 simultaneous fundamentals and their harmonics, making it an ideal and broad tonal test signal.
Two tests were performed:
- Audio signal path passed through the Record Mixer with no adjustments.
- Audio signal path bypassed the Mixer and went straight to the Hardware Interface.
1) Audio through Record Mixer and 2) Audio through Record Hardware Interface only:
There is absolutely no difference between the input versus output test signal, from 0 to over 20 KHz, even for weak harmonic levels below -110 dB. See the following animation or download the more detailed originals, below:
Inverted Phase Summation Test:
Selig confirmed my results, above, using an industry-accepted null test, below. He exported the Mixer/Hardware Interface output and summed it with the original test signal. The result was a perfect null, meaning that the two signals canceled each other out because they were perfectly identical:
- This myth is busted. Record's mixer is "ruler flat".
If you think you're hearing a difference, it's not due to the default mixer configuration.