Alvas.Audio is C# audio library for .Net developers.

• Records audio

• Plays audio

• Set up mixer controls

• Edits audio

• Converts audio

1. Recorder allows:
   1. record uncompressed audio data (PCM);
   2. record compressed audio data: IMA ADPCM, Microsoft ADPCM, CCITT A-Law, CCITT u-Law, GSM 6.10, MPEG Layer-3 (mp3) and others;
   3. record data to the stream (file stream, memory stream);
   4. pause and resume recording;
   5. get the current sound position;
   6. record data to any recorder installed in the system (multiple sound cards).
2. Player allows:
   1. play uncompressed audio data (PCM);
   2. play compressed audio data: IMA ADPCM, Microsoft ADPCM, CCITT A-Law, CCITT u-Law, GSM 6.10, MPEG Layer-3 (mp3) and others;
   3. play data from the stream (file stream, memory stream);
   4. play mixed audio data;
   5. pause and resume playing;
   6. get the current sound position;
   7. play data from any player installed in the system (multiple sound cards).
3. Set up mixer controls:
   1. select source line for recording;
   2. change source line volume for recording;
   3. additional controls adjustment. For example, "Mic Boost";
   4. change master volume for playback;
   5. playback muting.
4. Editing
   1. change the speed of audio data;
   2. change the volume of audio data;
   3. join several pieces of audio in a single;
   4. cut a piece of the audio stream;
   5. insert a piece in the audio stream;
   6. remove a piece of the audio stream;
   7. create audio format from the byte array;
   8. insert and mix audio data into main audio data with specified offset multiple times;
   9. reverse audio wave stream;
   10. split stereo audio stream to two mono streams;
   11. merge two mono audio streams into one stereo.
   12. Several audio files concatenation.
5. Converting
   1. Convert the audio data from one audio format to another.
   2. Convert audio wave stream to mp3 stream.
   3. Convert Dialogic .vox (adpcm) stream to Mp3 stream.
   4. Change Wave stream to MP3 stream. if Wave stream contains MPEG Layer 3 data.
   5. Play, record and convert RAW headerless format (SLINEAR etc) (used in Asterisk PBX).
   6. Play and extract audio data from Avi streams.
   7. Encode and decode Dialogic .vox (adpcm) format data (used in Asterisk PBX).
   8. Convert audio wave stream to mp3 stream
   9. Convert Dialogic .vox (adpcm) stream to Mp3 stream
6. Misc
   1. View the level of the input sound signal.
   2. Sign library with strong name. Audio library can be added to GAC

1. Writes ID3 tag version 1 from MPEG Layer3 streams.
2. Writes INFO metadata(similar mp3 tags) from Wave streams.
3. Checks audio signal silence.

• MP3 Format Sound: .mp3
• Windows Media Audio: .wma
• AIFF (.aif .aifc .aiff)
• AU (.au .snd)
• MIDI (.mid .midi .rmi)
• Windows Media Video: .wmv
• Advanced Systems Format: .asf
• Motion Picture Experts Group: .mpeg
• Audio-Video Interleaved: .avi
• WAV: wav

• Matroska (.mka)
• MPEG (.mpa .mp2 .m1a .m2a)
• MPEG4 (.m4a .aac)
• Musepack (.mpc)
• RealMedia (.rm .rmvb .ra .ram)
• 3GP (.3gp .3gpp .3g2 .3gp2)
• FLAC (.flac)
• Ogg Vorbis (.ogg)
• WavPack (.wv)
• Monkey's Audio (.ape)
• True Audio (.tta)
• Apple Lossless Audio Codec (.alac)
• AMR (.amr)
• Trackers (.xm .s3m .it .mod .umx)
• and much more...