Need help with Volume Slider GUI
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Nikos Korobos on 3 Apr 2022
Hello everyone, I've been trying to code an audio player for wav files throught the Matlab GUI (App Designer).
Currently stuck on the volume slider function.
When I choose another volume level, the sound file restarts instead of continuing from the point I used the slider to adjust the volume level.
My code so far:
Sample code I found online:
Thanks in advance!
jibrahim on 4 Apr 2022
Consider using audioDeviceWriter to play the audio, and dsp.AudioFileReader to read from the audio file. You do not need to restart these objects when you tune the volume gain.
% EXAMPLE: Read in an audio file and play it back using the standard
% audio device writer.
AFR = dsp.AudioFileReader('speech_dft.mp3');
ADW = audioDeviceWriter(AFR.SampleRate);
gain = 1;
audio = AFR();
release(AFR); % close the input file
release(ADW); % close the audio output device
At a high level, you create AFR and ADW once in your app (at setup time). You feed the audio signal to ADW. Use the latest and greatest gain to scale the audio.