I only get a hiss when I overdrive the volume....

I seem to be getting the hiss from anywhere between 15 to 100. I haven't gone over 100 as the sounds are loud enough.

With the breakout mod, I found much of the his was gone. I experienced hissing a bit when I had a loud song or noise playing.

Check the MP3. The built in speaker and amp isn't going to be as good as the speakers & amp on your PC, the hiss is likely to be a part of the track.

Try using Audacity (it's free) to remove hiss and see if it gives better results.

Sorry, I sould have mentioned that I broke out the EZ-B sound to play through an external amplified speaker.

Funnily enough the sound files I created where done using Audacity so it's not the MP3 quality, and any other audio such as SayEZB() ect are crystal clear.

I just got home and I tried reducing the soundboard volume down to 1, and the hiss can still be heard. In fact the volume of the hiss doesn't change when I adjust the volume slider. confused

Hi @Steve G

With the first stage audio breakout the music should be very clean. The reason your are likely seeing the voices come out clean is likely because voice is in a limited frequency range where as music is in a broader range.

A couple things to check:

Is the gain set pretty high on your external amplifier or is it just volume adjust?

Is your audio cable shielded?

Have you tried reflowing your solder joints with a bit of flux?

@Jeremie.

Thanks for responding. I don't have a separate amplifier as the speaker has one built in, so no gain control, just a volume wheel which is set to medium level. The audio cable is shielded. It came from an old pair or headphones. And the solder I used had a flux core mix so there shouldn't be a problem there.