I am new to iOS programming and I want to port an Android app to iOS using Swift 3. The core functionality of the app is to read the byte stream from the microphone and to process this stream live....

Whenever I try to read a .wav file, the following error comes. I have searched everywhere but had no progress upon this. CODE: import scipy as sp import matplotlib.pyplot as plt sr, y = sp.io.wavf...

I'm trying to train a RNN for digital (audio) signal processing using deeplearning4j. The idea is to have 2 .wav files: one is an audio recording, the second is the same audio recording but process...

I am going through these two librosa docs: melspectrogram and stft. I am working on datasets of audio of variable lengths, but I don't quite get the shapes. For example: (waveform, sample_rate) = l...

I have to detect whether a file is a valid mp3 file. So far, I have found two solutions, including: this solution from Peter Carroll using try-catch expression: try: _ = librosa.get_duration(f...

I am working on an M4a file with the following metadata: Metadata: major_brand : M4A minor_version : 0 compatible_brands: M4A mp42isom creation_time : 2019-08-14T13:45:39.000000Z iTunSMPB : ...

I'm currently extracting mel features from my baby cry sound dataset and the wav files' sampling rate is 8kHz, 16bit, mono and about 7 sec. Mel-Spectogram when sr = 16000 Mel-Spectogram when sr ...

I dug a lot on SO and some nice blog post But seems I am having unique requirement of reading Video and Audio buffer separately for further processing on it while recording going on. My use case ...

I have a load of 3 hour MP3 files, and every ~15 minutes a distinct 1 second sound effect is played, which signals the beginning of a new chapter. Is it possible to identify each time this sound e...

I'm trying to create a project that pulls in a live stream audio file from the internet and continuously samples the audio looking for the most dominant frequency for a given time period. The idea ...

I'm working on a mac application that mix audio from a VideoCard and an external audio card. How can I change volume on each channel (not each source) independently using AVAudioEngine. Let's say...

I am trying to use ndk-build to use native code for audio processing from Little Endian in an Android application (I don't have JNI yet). When I executed ndk-build in jni dir I got ($USER_PATH is ...

We have two lowpass filters with a different cutoff value: b, a = signal.butter(2, 0.125) b2, a2 = signal.butter(2, 0.140) When applying the first filter to x[0:10000] and the second to x[10000...

I am trying to extract MFCC vectors from the audio signal as input into a recurrent neural network. However, I am having trouble figuring out how to obtain the raw audio frames in Swift using Core ...

First time posting here, lets see how this goes. I trying to write a script in python which would add a second of silence in the beginning of the wav file, but so far been unsuccessfully in doing ...

I am making an app to listen to heartbeat . I could listen to filtered heartbeat signal through headset but not through mobile speaker as the mobile speaker doesn't support such low frequencies , I...

According to Microsoft, starting with Windows 10, applications using shared-mode WASAPI can request buffer sizes smaller than 10ms (see https://msdn.microsoft.com/en-us/library/windows/hardware/mt2...

I'm trying to find out if there's a way to determine if an AAC-encoded audio track is encoded with Dolby Pro Logic II data. Is there a way of examining the file such that you can see this informati...

From a series of MIDI notes stored in array (with MIDI note number), does an algorithm exist to get the most likely key or scale implied by these notes?

I want to record and playback audio in Mac. Now, I have some problems about the settings for Input/Output/ChannelFormat … I showed you some code I try below. // Setup audio device - (OSStatus) set...

We are trying to implement a music player app with Equalizer presets. We are successful in getting presets from iPod and applying it through audio unit. But, now we need to display sliders and set ...

This question is usually asked as a part of another question but it turns out that the answer is long. I've decided to answer it here so I can link to it elsewhere. Although I'm not aware of a way...

This is my first post. Is it possible to change the speed of a playback during playback? I want to simulate a car engine sound and for this the first step is to change the speed of a looped sample ...

First off I'm trying to implement this chord detection algorithm: http://www.music.mcgill.ca/~jason/mumt621/papers5/fujishima_1999.pdf I originally implemented the algorithm to use my microp...

For my final year project i am trying to identify dog/bark/bird sounds real time (by recording sound clips). I am using MFCC as the audio features. Initially i have extracted altogether 12 MFCC vec...