Hello everyone,
I've been working on a space gun prop project with light and sound both powered by a Teensy 3.2. All of that has worked pretty much flawlessly both when testing the individual components on a breadboard and in the soldered prototype I just finished.
However, there has been one persistent issue that I can't seem to get rid of and that's some kind of noise that can be heard whenever the currently played sound is on the quieter side. You can kinda here it in this video whenever one of the shot sequences ends. Instead of fading out properly, there's a noise that cuts off once the sound file ends.
I've tested this with multiple amplifiers and speakers and as far as I can tell, they're not to blame, which leaves me wondering what else I can do to fix this. I also know that it's not part of the wav-file. I've also attached that to this post just in case anyone wants to have a look.
View attachment AudioFiles.zip
The amplifier is powered from the 3.3V of the Teensy and grounded to the Teensy GND as well. The signal input is connected to the Teensys DAC through a 10uF capacitor with the - pole facing the amplifier.
I'd be very grateful for any suggestions on what I can do to fix this as it does detract from the overall quality quite a bit. As a note: I don't have a lot of space, which is why I'm not using the Audio shield even though that might improve things. I'd prefer to keep it that way but if necessary I could check if it's somehow possible to fit the shield into my prop.
Thank you
I've been working on a space gun prop project with light and sound both powered by a Teensy 3.2. All of that has worked pretty much flawlessly both when testing the individual components on a breadboard and in the soldered prototype I just finished.
However, there has been one persistent issue that I can't seem to get rid of and that's some kind of noise that can be heard whenever the currently played sound is on the quieter side. You can kinda here it in this video whenever one of the shot sequences ends. Instead of fading out properly, there's a noise that cuts off once the sound file ends.
I've tested this with multiple amplifiers and speakers and as far as I can tell, they're not to blame, which leaves me wondering what else I can do to fix this. I also know that it's not part of the wav-file. I've also attached that to this post just in case anyone wants to have a look.
View attachment AudioFiles.zip
The amplifier is powered from the 3.3V of the Teensy and grounded to the Teensy GND as well. The signal input is connected to the Teensys DAC through a 10uF capacitor with the - pole facing the amplifier.
I'd be very grateful for any suggestions on what I can do to fix this as it does detract from the overall quality quite a bit. As a note: I don't have a lot of space, which is why I'm not using the Audio shield even though that might improve things. I'd prefer to keep it that way but if necessary I could check if it's somehow possible to fit the shield into my prop.
Thank you