Amplifying Audio from a IoTiny

Question

Im using the soundboard exb to play audio files but they are very faint.  Is there a way to add an amplifier like on the ezb?  I couldn't find a seperate audio out other than the speaker plug.   The default voice from the IoTiny sound good but not my audio files which are mp3,  i amplified the files in Audacity but they are still faint.

DJ Sures · Accepted Answer

You can right click and normalize the audio when editing the track in the soundboard  connect an external amplifier to the speaker output jack if you want a different speaker

kashyyyk · Answer

Ok thanks, I'll give that a go.  I wasn't sure I could if the output was already amplified.

DJ Sures · Answer

The output is amplified, but you’d have to control the volume there might be a direct breakout from the dac, I don’t know where it is. Can always check the schematic for the iotiny on GitHub https://github.com/synthiam/E-20_EZ-B_IoTiny or someone who knows a better answer might chime in

Nomad 6R · Answer

hi you can use mp3 volumer to make mp3 files louder. there are more of this kind of tools.mp3 normalizer for excample. mp3 volumer

EzAng · Answer

Hi, I bought these at Amazon https://www.amazon.com/MakerHawk-Full-Range-Advertising-Separating-JST-PH2-0mm-2/dp/B07FTB281F/ref=pd_sbs_504_2/147-6918351-1521951?_encoding=UTF8&pd_rd_i=B07FTB281F&pd_rd_r=ac4af3f4-11ea-4e21-aa74-020409116ccd&pd_rd_w=TIlMg&pd_rd_wg=9HW28&pf_rd_p=52b7592c-2dc9-4ac6-84d4-4bda6360045e&pf_rd_r=X76N5JYB2WND3YM30NHH&psc=1&refRID=X76N5JYB2WND3YM30NHH 2 speakers that work well with the IO tiny  - sound is much louder thanks Angelo

Nomad 6R · Answer

EZang  good find. you can also use speakers from an old pc screen.

kashyyyk · Answer

I have a 4 inch pyle speaker that sounds good with the default voice that comes with the Iotiny, like when it says the battery is low, my MP3s don't.  I'll have to play with the audio files and see if the problem is with them.  I'll also have to try as a wav file and see what that does.

Jeremie · Answer

I very confident that the MP3s (or MP3 encoder) you are using is giving you a lower volume. Usually MP3s and Wav files are louder that the default voice. The speaker that comes with the IoTiny is quite loud with the onboard amplified circuit. Here's an MP3 that I use to test with: Future_Chiptune.zip There is no DAC breakout on the IoTiny but you can solder to the left side of C11 if you'd like to run the audio to your own amplified circuit, at this point I feel like it'd be easier to figure out your encoding issue but anyway here's the location if you're feeling adventurous:

afcorson · Answer

Thanks Jeremie for the idea of soldering to the left side of C11 to run audio to a separate  amp. This has at last given me good sound from the IoTiny.

DJ Sures · Answer

When editing any files, use normalization in your editor.

Also, the ARC soundboard editor has a normalize feature built in. Use it to normalize your audio files in the soundboard after they’ve been imported

DJ Sures · Answer

It’s not documented in the manual for the soundboard, but here’s the option circled

robo rad · Answer

Interesting on soldering to C11 for good sound...I have a question about where the data specs say 3.3v --5 volt signal out tolerant. would my ultrasonic sonar that runs between 4-5 volts be too much current draw from signal output? I know I was advised never to do that on EZB4

Edit-----Oh okay I see now that is only 5volt input not output only 3.3v.

jp15sil24 · Answer

Hi y'all, I’m revisiting this older thread with a practical solution.

To increase the audio volume from the IoTiny speaker output, I’m using a Logitech Z120 powered by 5 V via USB. The IoTiny speaker output is high-impedance (line-level like), so it does not load or stress the IoTiny output stage.

The Z120 has its own amplifier, adjustable volume, and provides more than enough power for voice output.

I configured it in mono by tying the left and right inputs of the Z120 together. The result is a clean, intelligible sound, with no noticeable distortion or noise.

This setup works very well for robot voice / TTS applications and requires no additional amplifier circuitry.

Nomad 6R · Answer

hi jp15sil24 did you connect the speakers using the 2 wire connection on the iotiny ? thanks

jp15sil24 · Answer

hi Patrick,  I removed the small speaker,  I cut the z 120 input plug and connected the cable directly on the iotiny

Nomad 6R · Answer

jp15sil24 nice you have also a volume control on the speakers . and they are not expencive . great find .

kashyyyk

Amplifying Audio From A Iotiny

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