Signal Generator

For some reason this app turns your phone media volume up to 100% regardless of setting and leaves it up after. I've been deafened a couple of times when I go to listen to music after.

Pink noise beats crashing waves any night. Small app for a nights sleep...priceless.

I use it for linechecks on stage, on my old Galaxy S2 and in conjunction with a DI box. Works great and everything more complicated would be useless ballast. Update Jul. 2017: Had to factory-reset the phone and wanted to add to my review: Sinewave practically free of any artefacts and pink noise with an almost perfect -3dB/oct slope, flat from 20Hz - 20kHz. Running on the 6 year old Galaxy SII. (Verfied using the Voxengo SPAN analyzer plugin on my DAW, using line inputs of an EchoAudio AudioFire audio interface.)

The sine wave at 750 Hz is the exact sound of my school bell ring, it the perfect prank to pull on my classmates!

Creates signals as it's supposed to, but the interface refuses to close and the keyboard lingers in screen when the app is closed.

Does pretty well. Although I'd like to have +/- buttons in addition to the frequency slider, it's a bit difficult to test my lower hearing range currently. I use a headset with an analog volume control, so loudness isn't a problem for me.

This is a sweet little app but could use 2 things: 1) A background mode (I need to run an analyzer on my phone while the generator is running) and 2) A sweep function! In any case, great work and thank you for sharing with us!

This app when you turn it on has the vol on max every time. This app should be marked as a health hazard. Too bad though, once you regain your hearing and turn it down the pink noise is very smooth. Uninstalled not worth it

The sine wave at 750 Hz is the exact sound of my school bell ring, it the perfect prank to pull on my classmates!

This can piss off people hard, thanks to it's ability to suppress someone who is trying to harrass or harm you. WEAPON

Does the job well. Especially to ignored those sounds that drive you nuts. You should have a donation version.

Does everything I want. Great app. Very useful for debugging circuits and such. It'd be cool to have more waveforms to choose from but I'm not gunna take a star off for that.

Ridiculous

Works great! I agree with the comment that the Dev should have a donate version.

I use it for linechecks on stage, on my old Galaxy S2 and in conjunction with a DI box. Works great and everything more complicated would be useless ballast.

Great app. I work in audio and i use it daily to test the I/O

Great, free signal generator. Very limited functionality but as a simple single tone generator combined with white and pink noise for audio system testing - it's great value for what you pay for it - ie nothing.

This is a sweet little app but could use 2 things: 1) A background mode (I need to run an analyzer on my phone while the generator is running) and 2) A sweep function! In any case, great work and thank you for sharing with us!

This app when you turn it on has the vol on max every time. This app should be marked as a health hazard. Too bad though, once you regain your hearing and turn it down the pink noise is very smooth. Uninstalled not worth it

These graphs leave little wiggle room for low freq ones. Mayybe only 1/10th of the slider scroll is dedicated here. Above 2khz, is okay. Below it, u have to type the desired freq, if u likt to play below 2khz,a lot, u will have a devil pf time tweaking as there is little scroll range dedicated here,go elsebwhrre

Anything around/above 16500 Hz works a dream ;)

Pink noise beats crashing waves any night. Small app for a nights sleep...priceless.

1: Upon starting, my phone asks if I am sure I want to crank the earphone volume up to 100%, indicating that some app tried to do so. 2: It stops when the screen goes to sleep (after 30 seconds in my phone) making it useless for ambient sound continuous blocking.

This can be a useful tool for testing your own hearing, also as a masking device which provides the common forms of white and pink noise. However one huge note of caution: do not start this device with headphones in your ears - you risk serious hearing damage! For some strange reason the app designers have encoded this so it automatically opens up with your phone set to full volume, unacceptable. I was able to use it to determine the specific frequency at which my high frequency hearing vanishes (8.4 kz)

4 "DEWAYNE CARLTON THOMAS" & "FRANCES ATTWELL MADISON THOMAS". "MONTHLY TREASURY CHECKS WERE BEING RECEIVED 264 55 4999" "DEWAYNE MET FRANCES. IN JCKSNVL, FLA."

Galaxy S4 screen resolution breaks this app. All of the controls are tiny on the screen. Looks/works fine on a Galaxy Nexus.

Turn the volume up and irritate your friends with custom R2-D2 sounds!

It always sets the media volume to maximum. This should never be done! You can also hear that the white noise loops.

Plugged in the the bnc from the phone to the oscilloscope, got a pretty accurate frequency. Though doesn't really work for low frequency, phone hardware limitations.

The sliders work well, but inputting the frequencies directly into the box is a hit or miss (mostly a miss)

Lol I am r2-d7

Pink noise beats crashing waves any night. Small app for a nights sleep...priceless.

Works exactly as described. Great for fine-tuning car sound systems.

Does everything I want. Great app. Very useful for debugging circuits and such. It'd be cool to have more waveforms to choose from but I'm not gunna take a star off for that.

i think it is working acurately !

Sliders are hard to grab, sine waves are distorted and aliased, especially at high freq. Sine does not reach full scale. Noise is just a recording.

Aha my family thought it was the fire alarm thingy going off lol!

Needs the ability to run in the background with accessible controls on the task bar. There is another app that does this but IMO the pink noise doesn't sound as good as it does with this app. Otherwise nice job!

Does pretty well. Although I'd like to have +/- buttons in addition to the frequency slider, it's a bit difficult to test my lower hearing range currently. I use a headset with an analog volume control, so loudness isn't a problem for me.

Works fine , testing audio of human ears capabilities as a generator