I'm programming in Julia and I would like to reproduce some simple audio, like single notes or similar.
I was wondering whether there is a way or a library to reproduce simple sounds. Is there anybody who know it?
Assuming that you need this for things like having a sound signal to let yourself know that your computations has finished this will work:
using WAV
y, fs = wavread(raw"C:\Windows\Media\Ring01.wav")
wavplay(y, fs)
Related
Is it possible to add specific reverb to my sound effect/music track in libgdx?
I want to add outdoor/indoor reverb to make all tracks sounded the same.
I don't think that Libgdx has a mechanism to adding effects to sound. The Sound class delivers no function for this.
I see three solutions here:
Prepare two kinds of sounds (one with reverb one without - it is easy to do using software like Audacity - and play one or another due to environment of player's current being
Try to implement it yourself
I see that in the Sound class there is setPitch(long soundId, float pitch) method. Due to Wikipedia the reverb is just a kind of echo so maybe (but not for sure) you could achieve the effect by
making copy of sound
slowering it a little
lowering the volume
playing simultaneously with original sound
Find 3rd part library that will do it for you - the Google returns some examples of libs working with libgdx like SoundTouch Audio Processing Library - maybe you will find something usefull
First one is the easiest and if you are not afraid of space problems I would strongly recommend it to you (althought why not to try implementing it)
I've implemented reverb, positional audio, and arbitrary filters using OpenAL against the latest libgdx 1.10+/lwjgl 3+ with this demo code, based off of gdx-sfx (which only works with lwjgl 2) and libgdx-audio-effects.
I'd like to promote this into a fully fledged library at some point 😂
Here is what i like to achieve:
I like to play around in creating "new" software / hardware instruments.
Sound processing and creation is always managed by software. But one could play the instrument via ultrasonic distance sensor for example. Another idea is to start playback when someone interrupts the light of a photoelectric barrier and so on....
So the instrument would play common sounds, but has to be used in an unusal way. For example, the ultrasonic instrument would play a sound if it detects something in a certain distance. The sound could be manipiulated in pitch for example if the distance gets smaller.
Basically i like to playback a sound sample and manipualte this in realtime.
I guess i have to use WAV samples for this, right? And which programming language do you think fits best for this task?
Edited after kevins hint: please kick me into the right direction - give me a hint where to start.
Thanks in advance
Since you're using the the Processing tag, you can try Processing.
It comes with a sound library like Minim or you can install beads which is great. There's actually a nice book on it: Sonifying Processing
You might find SuperColider fun as well.
The main thing is what are you comfortable with at the moment ?
If Processing syntax looks intimidating, you can actually try a different programming paradigm like data flow. In which case you can use PureData(free, opensource) or MaxMSP(very similar, but commercial). The idea is rather than typing instructions, you connect boxes with wires which is fun and the examples are great too.
If you're into c++ there are plenty of libraries. On the creative side, there's a nice set of libraries called OpenFrameworks that's easy and fun to use. If this is your cup of tea, have a peek at Maximilian.
Bottomline is: there are multiple options to achieve the same task. Choose the best tool for your (based on your background) or try each and see what you like best.
You asked "And which programming language do you think fits best for this task?" - I would also suggest using Processing. I have been used Processing to work with sounds previously. And in all cases I used Minim. It has many UgenS to generate sounds programmatically.
Also, you wants to integrate with some sensors. I'm not sure what types of sensors you will use, but Processing goes pretty well with different Arduino modules and sensors. Check this link for more direction.
Furthermore, you can export your project as .exe or executable .jar files. And their JS version (P5.js) works almost the same as the Java version.
I'd like to play a sound and have some way of reliably telling how much of it has thus far been played.
I've looked at several sound libraries but they are all horribly underdocumented and only seem to export a "PlaySound, no questions asked" routine.
I.e, I want this:
a = Sound(filename)
PlaySound(a);
while true:
print a.miliseconds_elapsed, a.length
sleep(1)
C, C++ or Python solutions preferred.
Thank you.
I use BASS Audio Library (http://www.un4seen.com/)
BASS is an audio library for use in Windows and Mac OSX software. Its purpose is to provide developers with powerful and efficient sample, stream (MP3, MP2, MP1, OGG, WAV, AIFF, custom generated, and more via add-ons), MOD music (XM, IT, S3M, MOD, MTM, UMX), MO3 music (MP3/OGG compressed MODs), and recording functions. All in a tiny DLL, under 100KB in size.*
A C program using BASS is as simple as
HSTREAM str;
BASS_Init(-1,44100,0,0,NULL);
BASS_Start();
str=BASS_StreamCreateFile(FALSE,filename,0,0,0);
BASS_ChannelPlay(str,FALSE);
while (BASS_ChannelIsActive(str)==BASS_ACTIVE_PLAYING) {
pos=BASS_ChannelGetPosition(str,BASS_POS_BYTE);
}
BASS_Stop();
BASS_Free();
This is most likely going to be both hardware-dependent (sound card etc) and OS-dependent (size of buffers used by OS etc).
Maybe it would help if you said a little more about what you're really trying to achieve and also whether we can make any assumptions about what hardware and OS this will run on ?
One possible solution: assume that the sound starts playing more or less immediately and then use a reasonably accurate timer to determine how much of the sound has played (since it will have a known, fixed sample rate).
I'm also looking for a nice Audiolibrary, where i can directly write on the Soundcards Buffer. I didn't have time yet to have a look at it myself, but pyAudio looks pretty nice. If you scroll down on the page you see an example similar like yours.
With help of the buffersize, number of channels and sample rate you can easily calculate the time each loop-step lasts and print it out.
I've searched the net but didn't found anything interesting. Maybe I'm doing something wrong.
I'm looking for sound synthesis API written on C, C++ or even Objective-C, which can synthesize different types of waves, effects are optional.
Here's a complete library/toolkit for FM (Frequency Modulation) synthesis:
link1
link2
If you have time to spare... creating simple sound synthesis from scratch is actually a fun endeavor. If you create a small buffer of 256 16 bit samples which represent either a sine. a sawtooth, block or pulse, you can copy these to a live audiobuffer (e.g. a small buffer (say 16kb)) which constantly loops. By staying ahead of the playposition, and constantly filling up the buffer with new values, you can create the soundoutput.
You can use the small buffers to combine these in interesting ways (simplest is just to add them together (additive synthesis)).
The frequency of the tone can be manipulated by using a bigger or smaller sampling step through the small buffers. Amplitude can be manipulated by scaling the samples before putting them into the output buffer.
Great fun experimenting with this!
If you have this step nailed, you can add more sophisticated effects like filters (low pass, high pass, etc) and effects (reverbs, echoes, etc)
R
Have you looked at the synthesis toolkit (STK)? It's in C++ (I don't think ObjC is the right language for audio synthesis, in fact audio units, Apple's own way of doing audio stuff, including generators/filters/effects... is in C++).
STK will run on Mac OS X, and iOS no problem (CoreAudio is supported), but will also run on Linux and Windows (Direct sound and ASIO), using RtAudio. It's really nicely done and lightweight, these guys have spent a lot of time thinking about it and it will definitely give you a big head start. It can handle loads of different audio file formats + midi (and hopefully OSC soon...).
There is also Create and CLAM which is huge, these include GUI components and many other things which you might or might not want. If you're only interested in doing sound synthesis I really recommend STK.
PortAudio is also a great C API that we used last semester in an audio programming course. It provides an audio callback...what more could you need!?
I haven't tried incorporating it with anything in Objective-C yet, but will report back when I do.
Writing audio synthesis algorithms in C/obj-C is quite difficult in my opinion. I would recommend writing your signal processing algorithms using PureData and then use ZenGarden or libpd to embed and interpret the pd patches in your app.
Another C++ library is nsound:
http://nsound.sourceforge.net
One can generate any kind of modulated signal using the Generator class or using the provided Sine class. Each time-step can have it's own instantaneous frequency and phase offset.
You can also experiment with the Python module to prototype your algorithm quickly, then implement in C++. It can produce pretty matplotlib plots from Python and even from C++!
Have you looked at CSound? It's an incredibly flexible audio generation platform, and can handle everything from simple waveform generation to FM synthesis and all kinds of filters. It also provides MIDI support, and you can extend it by writing custom opcodes. There's a full C API and several C++ APIs as well.
I just need to be pointed in the right direction as I may be in over my head here.
If I wanted to write a program to analyze a sound wave how would I go about this?
I have an idea that it will involve a mixture of a maths package (like mathematica or matlab) and C or C++ but not sure where to start.
I'm only wondering at the moment but any pointers would be greatly appreciated.
I'm new but not inept and a good challenge is always the best way to learn.
Mathematica and Matlab can both take .wav files as inputs.