Jan 23, 2017 at 4:21 AM
- Apr 30, 2008
- Reaction score
- Apr 30, 2008
so I finally decided to try (moving up my never ending audio todo list, I do one thing, I have 3new I want to try ^_^).
whatever I tried, it's not worth the effort for FR alone IMO, and even the 30$ startech usb ADC works fine for such purpose into a cheap mic. but the distortion figures went down a good deal using a tablet as DC source (around 2.3v) and measurement done with the focusrite 2i2 as input.
thank you for reminding me to use an external DC supply.
Yeah, the Startech is pretty good most purposes. But if you can build that battery adapter, it would be just as convenient as using the Startech. If you have to assemble the damn thing using alligator clips all the time, then it's not worth the effort. Speaking of an audio to-do list, I've been playing with a new audio toy and the my first project with it may or may not be on topic for this thread, so I'll also post it elsewhere.
The new toy: The Web Audio API. A web browser apparently has some pretty sophisticated audio tools already built in, and a programmer can quickly build synthesizers, recorders, FFT-based analyzers, and custom audio file playback systems. The API gives you access to oscillators, biquad filters, splitters, delay and gain modules, a convolver, etc. And you can work at the sample level if the processor you're looking for isn't already built in.
That link is flaky, so it might take a few tries to get it. An app like this has been made before, but using Flash. Maybe, as the project improves I'll rename it to MEH (misguided EQ helper) or SICH (self-inflicted calibrator for headphones) Lol. Some more simple measurement ideas: maybe a finely and easily adjustable sine oscillator with a readout to make it super easy to find resonances and nulls quickly, a utility for experimentally determining what the ITD and ILD can be used as parameters in a crossfeed system. (I wonder if it can be done by using an earplug on the left ear and then using a the Web Audio API's oscillators to determine how much delay and magnitude on the left speaker can null the output on the right speaker the most.)
Let me see if I can find a more appropriate thread to re-post this info.