M-Audio MicroTrack 24/96 floor noise analysis

This is an analysis of jboyzh's MicroTrack 24/96. This is an analysis of recorded silence, no microphones plugged in.

All metering on the lowest level except where noted otherwise.

The graphs show a basis frequency analysis in Adobe Audition. Blue is left channel, purple is right channel.

Some things worth mentioning:

there's a weird 'wavering' noise floor on the left channel when using 1/4" TRS
this wavering is completely gone using the "L" level on a 24/96 recording
the 1/8" TRS has a much flatter noise floor
the 'metering' setting has influence on the noise level
the backlight does not seem to have any effect on the noise levels
the 1/4" TRS input has minor peaks:
- 16-bit: 6681 Hz and 20040 Hz
- 24-bit: 6694 Hz, 200074 Hz, 33567 Hz and 47837 Hz (intervals of 13380 Hz)
on the 1/8" TRS input there's only one slight peak on the left channel, around 33450 Hz

M-Audio MicroTrack 2496	"H"	"M"	"L"	other
1/4" TRS 16-bit 44.1KHz				"L"+backlight
1/4" TRS 24-bit 44.1KHz (different metering)	metering:max		metering:max	"L"+metering:med
1/4" TRS 24-bit 96KHz
1/8" TRS 16-bit 44.1KHz
1/8" TRS 24-bit 96KHz	"M"+high metering	"M"+medium metering	"M"+low metering