This thing is awesome for testing response of cabs, and your ears. I can hear up to about 19kHz. I either lost the upper thousand, or my earphones just don't go up that high. Or it might be both. I can still actually hear 20Hz, which is an awesome sound. This thing does pink, white, sine, square, sawtooth, everything. You can do sweeps and multi-tones. It's great. http://www.nch.com.au/tonegen/index.html
Here's a tip. If you want to run through some spaekers but don't want to take a PC and internet connection with you, burn some tones onto a CD.
this thing exports to WAV, so, burning to a cd is a piece of cake. It is great if you can take your PC(i have a laptop) to test speakers. I found that the lowest sine wave I can hear is well below 20Hz. like about 10 or so. But I am not sure if that is hearing, or feeling. But anyways, it is great for find lower response range of speakers. My laptop speakers don't go higher than 100Hz.
I downloaded it and it's not letting me do anything other than 1000 hz....lemme guess, if I wanna hear anything else, I'mma hafta buy something right? bah! maybe I downloaded something different?
At 20Hz, you're probably just hearing the speaker shaking around trying to reproduce it. I'm not saying you can't hear it but not a lot of speakers can't accurately reproduce it. Keep the volume down or you could damage something.
i have some earphones that go down to 10 Hz. i do keep a head on the volume, though. But I thought it was high frequencies that can damage your hearing faster.
I use to have that program. I must download it again. It is very handy. I dubbed some tones off onto tape as well. Good for alignment. Merls