Recent content by sekim

I'll try it. Don't even have to remove anything. Just use clip ended jumper wires to parallel in a bigger one, do the cal, unclip and go.

I saw less HF roll off on the analog scope, not sure why since I know its not the card. I'm thinking it might be that the relatively weak output Z of the Rangemaster with some stray capacitance is forming a low pass, at least that's my theory for now anyway. I scoped it internally, so no cable...

The sound card is flat as verified in RMAA and the HF roll off is in the device being tested. The sound card is a decent piece of gear with AK5394 for ADC and CS4398 for DAC, older but still very high spec. But that said, I will do a card calibration just in case since you made it so easy to do...

There is no compressor. The circuit is about as dirt simple as it gets. Its a single class A transistor with a single capacitor on the base that functions as a first order filter in conjunction with the bias resistors and the impedance of the transistor. The caveat is that the bias point is...

Actually they're not very close with respect to what the filter sounds like. The parts for the filter section were hand selected to produce a 2.6KHz cutoff. The device measures right on 2.6KHz with analog gear. It also measures right on 2.6KHz cutoff using RMAA multitone method but not with its...

Using the Measure button gives me these results for testing the Rangemaster. As can be seen in the attachment labeled Clean, when input to the Rangemaster is low and it outputs a somewhat clean sine and makeup gain is used the frequency plot shows ~2.23KHz cutoff which is fairly close the the...

OK, after digging in a lot deeper I discovered that the sine sweep result varies quite a bit based on the distortion % seen at the device output. But then the feature is "soundcard calibration" and even the cheapest soundcards will have at least an order of magnitude less distortion than a...

My apologies, I'm relatively new to your software and was going off a YouTube where they explained how they used your software to measure a device patched in loopback. They used your soundcard calibration feature, which seems ideal with is wizard workflow and the fact the only need is for a sine...

First order high pass filter device with 2.6K cutoff frequency was measured by analog oscilloscope and by RMAA software in loopback mode and both methods confirm 2.6K cutoff. REW (5.20 rc9) plots the same device as having a 260 Hz cutoff frequency when using the loopback calibration mode...