Soundbeam

Other than the processor noise that seems to sneak in at 7.7 and 15k4 hz, absolutely perfect. ( ok, there’s a ton more things it could do but sometimes this is all you need!)

100% great! I love this application I use it to monitor modulation characteristics on my Ham radio with the external microphone input. The graphics are really good kinda hard to tell your not looking at a dedicated scope, in spectrum mode you can clearly see band pass filter roll off. I would like to be able to vary the time base in scope mode perhaps in another version or update you do have the option of adjusting the vertical gain in scope mode and selecting linear or logarithmic display in spectral mode. Truly a five star development 73 de KF6FOK

This is a delightful app that functions as an oscilloscope for audio frequencies. I used an audio frequency generator (Function Generator Pro) on one device and plugged it into my iPhone via an audio cable and was able to view sine, square and triangle waveforms as if I were using an actual physical oscilloscope. I also built an electronic circuit to generate a sine wave and fed it into my iPhone via a Scarlett audio interface and that also worked wonderfully, showing the sine wave and frequency! The iPhone has a high-pass filter that cuts off anything over 10KHz, but for my projects that frequency was plenty high enough.<br/><br/>Running an audio app and Soundbeam on my iPhone simultaneously showed me the waveform and the FFT-style spectrum analysis—the audio came out the speaker and back in via the microphone. What a great and inexpensive way to help understand how sound waves work!<br/><br/>Enhancement request: let me zoom in horizontally while in waveform mode, and display the time scale.

Absolutely LOVE Soundbeam and especially appreciate the ability to record and save audio + video. My two requests are: enable longer recordings (IAP for this function would be welcome and purchased immediately) and (far less important) the ability to adjust background color from the default aqua-green. Regardless Soundbeam is awesome as-is.

It works!<br/>Useful tool to have, very modest price.<br/><br/>The user interface is real eye candy - in the same vein as the first AAA apps designed for iPhone.<br/><br/>Really happy with this. Thanks for creating it. I don’t see an approximate dB level when in waveform mode. That would nice.

Very powerful and robust little app! A fascinating, teaching aid for both technical and non-Technical applications! Extremely interesting!!!

Doesn't sample slow enough for some applications. I need to display several seconds of data on the screen.

This is really cool if you're an engineer or geek. Well worth $.99.. <br/><br/>I'm sure the iPhone's mic has a certain frequency range, but does it really cutoff at 100hz? Would be nice if it could go lower, preferably down to 20 or so hz, which I'm sure the mic isn't capable of. Maybe with an external mic the scale could shift down to 10hz? <br/><br/>Please make it as low as possible!