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NetBSD 6.1.5 - man page for esm (netbsd section 4)

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ESM(4)				   BSD Kernel Interfaces Manual 			   ESM(4)

     esm -- ESS Technology Maestro 2/2E PCI Audio Accelerator audio device driver

     esm*   at pci? dev ? function ?
     audio* at audiobus?

     The esm device driver supports sound cards based on ESS Technology Maestro, Maestro-2, and
     Maestro-2E PCI AC97 Audio Accelerator chips (ES1968 and ES1978).  Due to their power manage-
     ment capabilities, the Maestro chips are often used in laptop and notebook systems.

     The Maestro is a full-duplex device that allows independent playback and recording at sample
     rates between 4000 Hz and 48 kHz.	The sound processor is capable of handling and converting
     8 and 16 bit mono and stereo data.

     ac97(4), audio(4), joy(4), mpu(4), pci(4)

     The esm device driver appeared in NetBSD 1.6.

     Currently, this driver only supports 16-bit mono recording; an unknown bug causes stereo
     recording to miss a channel.  Also not supported yet are hardware volume settings, MIDI, and
     joystick input.

BSD					  June 22, 2005 				      BSD
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