audio

How to combine a photo and sound file to an video file which is acceptiable on youtube?

I'd like to combine a photo and some sound file together and upload to youtube, not sure how to do it. Any suggestion will be greatly helpful. Thanks. ...

SpeakHere sample can't play sound which loads from internet

I'd like to play sound file which loaded from internet, so I tried to start from iPhone SDK SpeakHere sample. I recorded the sound, then saved and uploaded to the internet, I could download that file and play without problem from sound tools. But when I tried to play that URL from SpeakHere, I am getting error Program received signal: “...

Note onset detection

I am developing a system as an aid to musicians performing transcription. The aim is to perform automatic music transcription (it does not have to be perfect, as the user will correct glitches / mistakes later) on a single instrument monophonic recording. Does anyone here have experience in automatic music transcription? Or digital signa...

How can I launch the default media player from a .NET application?

I need to launch a media file from a URL from within my c# .NET application. Is there any way to do this natively in .NET? I don't need an embedded player, I just need the default player to launch. I have tried System.Diagnostics.Process.Start("File URL"); but it launches the default browser and downloads the file, instead of attempt...

Hook to WM6 sound

How can i hook to the window mobile sound (driver?) and read the data while it is passing it to the speaker. ...

[Flash] Algorithmic sound and music generation

Hello, I'm looking to use procedurally-generated sound and music in a Flash program I'm writing. I haven't found anything in the ActionScript 3.0 reference manual that shows how to do this. Is this possible? Have any third-party tools been developed that can do this? Or can Flash/ActionScript communicate with external programming la...

Knowing which process produced a sound

My computer often produces a "ding" sound, and I can't associate it with anything. Is it possible to programmatically determine the source of the beeps? For example can I hook the sound driver? If so, can you point out some examples or references? ...

Adobe AIR 1.5 Sandbox + Motherboard Speaker

I'm curious if through AIR you could access your motherboard pc speaker? It's for an Alarm Type of program and would like pitch control so more than a simple beep. Can this be accomplished through AIR? Or if not in any web-based framework for that matter? Seems a bit tricky so I'd love to know if anyone has a solution. Thanks! ...

Where's the sound API in Silverlight? Or, how do I write a music app to run in the browser?

I would like to port a desktop music application to run inside the browser. Cunningham et al proposed using Flash a couple of years ago. I don't think it ever got off the ground though. Probably because Flash isn't really suited for a complex interactive editing application. Aside from simplifying the animation of the caret and scrol...

Calculate checksum of audio files without considering the header

I want to programmatically create a SHA1 checksum of audio files (MP3, Ogg Vorbis, Flac). The requirement is that the checksum should be stable even if the header (eg. ID3) changes. Note: The audio files don't have CRCs This is what I tried by now: 1) Reading + Hashing all MPEG frames using Perl and MPEG::Audio::Frame my $sha1 = Diges...

Looping problem with flash audio

At my client's request I have placed a song on her website, set to run on loop using flash. The swf is tucked inside of a table in her sidebar navigation. For some reason the swf doubles, then triples, etc. at the end of each play. I'm using Dreamweaver and Flash and have tried different combinations of parameters: Inside Flash: loop ...

Getting started with programmatic audio

I'm looking for resources, links, and so on to help get started working programmatically with audio. Specifically, the platform I'm working with exposes APIs to extract audio data from a resource (like an MP3), or to play back arbitrary data as audio. In both cases the actual data is byte arrays of 32bit floats representing 44.1 KHz ste...

How do I use the current sound out as an audio input in Quartz Composer?

If I want to build a spectrum visualizer of what's currently playing on my speakers (not the line in) what do I do? ...

Algorithm to mix sound

I have two raw sound streams that I need to add together. For the purposes of this question, we can assume they are the same bitrate and bit depth (say 16 bit sample, 44.1khz sample rate). Obviously if I just add them together I will overflow and underflow my 16 bit space. If I add them together and divide by two, then the volume of e...

What is a lightweight cross platform WAV playing library?

I'm looking for a lightweight way to make my program (written in C) be able to play audio files on either windows or linux. I am currently using windows native calls, which is essentially just a single call that is passed a filename. I would like something similar that works on linux. The audio files are Microsoft PCM, Single channel...

TRS to RJ9 conversion for audio in/output

I was wondering if anyone had resources that I could reference for creating a TRS (Tip-Ring-Sleeve) 1/8" audio, to RJ9 Telephony jack conversion kit. Effectively, I'm trying to create a bridge from an audio device (PC/MP3 player) to a telephone connection, allowing audio from the PC/MP3 player to be broadcast into a telephone line. Try...

Does GetMovieAudioVolumeLevels() support more than two channels of audio?

I have some code that uses GetMovieAudioVolumeLevels() to get levels of a QuickTime movie during playback. I have an 8 audio channel QuickTime movie, but using the GetMovieAudioVolumeLevels() call it only ever returns 2 channels. I am using kQTAudioMeter_DeviceMix, and right now I'm assuming because my MacPro can only actually playback ...

Convert a wma to wav programatically with Windows Media Encoder

Has anyone converted a WMA to a WAV using Windows Media Encoder? If so, do you have a short code snippet of how you did it? All samples I've seen have been for WAV to WMA, not the other way around. ...

How to retrieve duration of MP3 in .NET?

I have build a WPF application where users can drag and drop MP3 files onto a listbox. I need a way to calculate the total duration of the playlist. Any libraries I should use? Or is it possible using only the .NET framework? ...

Streaming audio from server to iPhone

I'm looking to stream some audio files I have on my server to an iPhone-client application I'm writing. Some of the audio files can be rather large in size, even after compression. My question is, is there a Cocoa framework that helps me with buffering the audio so it becomes available to the user while the rest is being brought down the...