Comments (7)
sensorium
commented on June 25, 2024
At first glance and from your description it is possible that the processor can't keep up when audio input is turned on.
I'll check if anything has gone wrong with audio input when I have a chance, but in the meantime I would recommend optimising the sketch for faster processing.
Some very slow operations are:
/ divide : try to use bit-shift approximations (for instance >>3 (/8) instead of /10, or even try float *0.1f)
map() : look at Mozzi's IntMap.h for a faster version
mtof(float) : try to use int or Mozzi's fixed-point versions, these all use look-up tables instead of calculating at run-time
To test, try carefully removing sections of the sketch (eg. set frequency with a literal number and comment out all the calculations), to see if it can continue with audio input without freezing.
… On 25 Aug 2017, at 1:24 am, Don Turner ***@***.***> wrote:
Steps to reproduce:
Change USE_AUDIO_INPUT to true in mozzi_config.h
Upload the default sketch for the NS1 nanosynth: https://github.com/SOUNDMACHINES/NS1nanosynth_sketches/blob/master/NS1NANOSYNTH_BASE_NO_DIGIPOT/NS1NANOSYNTH_BASE_NO_DIGIPOT.ino <https://github.com/SOUNDMACHINES/NS1nanosynth_sketches/blob/master/NS1NANOSYNTH_BASE_NO_DIGIPOT/NS1NANOSYNTH_BASE_NO_DIGIPOT.ino>
Expected result:
Sawtooth wave is played out of PIN 9 whilst the nanosynth has power
Actual result:
Sawtooth wave stops playing after around 10 seconds, and the device becomes unresponsive to MIDI input (no LED flashes when notes are sent)
Note: After problem has occurred to reflash the nanosynth you need to hold down the reset button, and release it only when the new sketch is shown as "uploading" in the Arduino IDE.
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dturner
commented on June 25, 2024
Rather than optimising the NS1 sketch I just tried the Mozzi Audio_Input example. I did this because it has a minimal amount of code in the updateAudio method:
int updateAudio(){
int asig = getAudioInput(); // range 0-1023
asig = asig - 512; // now range is -512 to 511
return asig;
}
I tested on 3 boards: NS1 nanosynth, normal Leonardo board and an UNO r3.
On all 3 I was unable to hear any output from PIN 9.
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sensorium
commented on June 25, 2024
Hi,
is your audio input signal in the range 0-5v (for a 5v arduino)? At least 2.5v amplitude?
… On 29 Aug 2017, at 7:56 am, Don Turner ***@***.***> wrote:
Rather than optimising the NS1 sketch I just tried the Mozzi Audio_Input example. I did this because it has a minimal amount of code in the updateAudio method:
int updateAudio(){ int asig = getAudioInput(); // range 0-1023 asig = asig - 512; // now range is -512 to 511 // output range in STANDARD mode is -244 to 243, // so you might need to adjust your signal to suit return asig; }
I tested on 3 boards: NS1 nanosynth, normal Leonardo board and an UNO r3.
On all 3 I was unable to hear any output from PIN 9.
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dturner
commented on June 25, 2024
My audio source is the nanosynth which generates a 5V square wave. The nanosynth also provides a 5V supply to the arduino.
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dturner
commented on June 25, 2024
More info on this forum post: http://www.sound-machines.it/forums/topic/bug-when-sending-audio-data-to-arduino/
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sensorium
commented on June 25, 2024
I've just tested the Mozzi audio input example sketch on an arduino nano 328p, and it works for me here...
I'll try to test with the boards you mentioned when I can.
There are known issues with Mozzi on Leonardo using Arduino IDE after 1.0.5.
TIm
… On 30 Aug 2017, at 7:36 am, Don Turner ***@***.***> wrote:
More info on this forum post: http://www.sound-machines.it/forums/topic/bug-when-sending-audio-data-to-arduino/ <http://www.sound-machines.it/forums/topic/bug-when-sending-audio-data-to-arduino/>
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thomasfredericks
commented on June 25, 2024
There are known issues with Mozzi on Leonardo using Arduino IDE after 1.0.5.
@sensorium is there an issue or a fix for this?
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