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How to enumerate Audio Compression Manager (ACM) …
https://matthewvaneerde.wordpress.com/2010/06/01/how-to-enumerate-audio-compression-manager-acm-drivers-on-your-system-spot-the-bug/
>acmenum.exe ACM Drivers found: 6 -- ACM Driver Details: Microsoft IMA ADPCM -- cbStruct: 1804 fccType: 0x63647561 (audc) fccComp: 0x00000000 ( ) wMid: 1 wPid: 34 vdwACM: 0x03320000 (3.50.12800) vdwDriver: 0x04000000 (4.0.0) fdwSupport: 0x00000001 ACMDRIVERDETAILS_SUPPORTF_CODEC cFormatTags: 2 cFilterTags: 0 hicon: …
How the Audio Compression Manager Works - …
https://docs.microsoft.com/en-us/windows/win32/multimedia/how-the-audio-compression-manager-works
The converter decompresses the data and returns the decompressed data to the ACM in a "shadow" buffer. The ACM then passes the decompressed shadow buffer to the waveform-audio driver. The ACM allocates the shadow buffers whenever it receives a prepare message. For waveform-audio input, the ACM passes empty shadow buffers to the driver.
Understanding Audio Compression Settings in Unity | by ...
https://medium.com/double-shot-audio/understanding-audio-compression-settings-in-unity-e879a821023f
ADPCM has a fixed compression ratio of about 3.5 and, while a good compromise between PCM and Vorbis/MP3, can sometimes cause unwanted noise (quantization distortion) in audio files with lots of...
Drivers - Seeking your help | TechSpot Forums
https://www.techspot.com/community/topics/seeking-your-help.100035/
Driver Features Compresses and decompresses DSP Group TrueSpeech(TM) audio data. Driver Version 1.00 ... Driver Features Compresses and decompresses Microsoft ADPCM audio data.
Sound but NO mic please help!!! - Tech Support Guy
https://forums.techguy.org/threads/sound-but-no-mic-please-help.592341/
Driver Features Compresses and decompresses audio data conforming to the ETSI-GSM (European Telecommunications Standards Institute-Groupe Special Mobile) recommendation 6.10. Driver Version 4.00 [ Microsoft IMA ADPCM CODEC ] ACM Driver Properties: Driver Description Microsoft IMA ADPCM CODEC
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