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esm(4) [netbsd man page]

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

esm -- ESS Technology Maestro 2/2E PCI Audio Accelerator audio device driver SYNOPSIS
esm* at pci? dev ? function ? audio* at audiobus? DESCRIPTION
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 management 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. SEE ALSO
ac97(4), audio(4), joy(4), mpu(4), pci(4) HISTORY
The esm device driver appeared in NetBSD 1.6. BUGS
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

Check Out this Related Man Page

ESS(4)							   BSD Kernel Interfaces Manual 						    ESS(4)

ess -- ESS Technology AudioDrive family audio device driver SYNOPSIS
ess* at isapnp? ess* at pnpbios? index ? ess* at ofisa? audio* at audiobus? opl* at ess? DESCRIPTION
The ess driver provides support for the ESS 1788, 1888, 1887, and 888 AudioDrive audio devices. The AudioDrive 1788 is a half-duplex device, while the 1888, 1887, and 888 are full-duplex. All are capable of 8- and 16-bit audio sample recording and playback at rates up to 44.1kHz. The AudioDrive takes 16 I/O ports. The I/O port range, IRQ, and DRQ channels are set by the driver to the values specified in the configura- tion file (or for isapnp, pnpbios, or ofisa, the values assigned from the firmware). The I/O port base must be one of 0x220, 0x230, 0x240, 0x250. The IRQ must be one of 5, 7, 9, 10 (or 15 on the 1887 only). The first DRQ channel must be selected from 0, 1, 3. The second DRQ chan- nel (used for playback by the full-duplex 1888/1887, ignored by the 1788) can additionally be set to 5. If both DRQ channels are used they must be different. The joystick interface (if enabled) is handled by the joy(4) driver. SEE ALSO
audio(4), isapnp(4), joy(4), ofisa(4), opl(4), pnpbios(4) HISTORY
The ess device driver appeared in NetBSD 1.4. BUGS
The AudioDrive devices have a SoundBlaster compatibility mode, and may be detected by the SoundBlaster driver (see sb(4)) rather than the AudioDrive driver. The workaround is to remove the SoundBlaster driver from the kernel configuration. BSD
June 22, 2005 BSD
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