Crystal CS-4231

The CS4231 and CS4231A are Mwave^TM 16-bit audio codecs from Cirrus Logic/Crystal, introduced in 1993.

	Released	Late 1993
	Bus	ISA 16-bit
	FM Synth	None
	Sample Range	4 - 50 kHz
	Packages	68-pin PLCC (-KL) or 100-pin TQFP (-KQ)
	Standards	None
	Plug & Play	No
	See Also	CS-4248

CS4231 and CS4231A are Mwave^TM 16-bit audio codecs from Cirrus Logic/Crystal, designed to take multiple analogue audio inputs, convert them into a digital signal, apply filtering and then convert them back into a combined/mixed analogue audio signal.

The CS4231 is pin-compatible with the CS4248 and its Analog Devices sibling, AD1848, but adds MPC Level 2-compliance and further operating modes that enhance its functions. These include full duplex support, a programmable timer, mono output with mute control, mono input with mixer volume control, ADPCM and Big Endian audio data format support, and independent selection of capture and playback audio data formats.

The CS4231A is a pin-compatible upgrade to the CS4231 and CS4248, and is fully backward-compatible with those earlier codec ICs. It added support for Windows Sound System (requires a separate synthesizer IC) and a selectable serial audio data port

Found on:

• Anchor Electronics MF-009 (FCC ID: J98MF-009) - with Yamaha YMF262 + OPTi 82C924. Also seen with AD1815 instead of CS4231.
• Some Aztech Sound Galaxy Basic 16/Pro 16/Basic Audio 16
• Aztech Nova 16 / Nova 16 Extra, Aztech Pro 16 II - with Yamaha YMF262 + Aztech AZT1605
• Aztech Washington 16 - with Aztech AZT2316
• MediaTrix AudioTrix Pro - with Yamaha YMF278B + MediaTrix MT-0002
• CrystaLake Multimedia 105 - with Yamaha YMF262 + OPTi MAD16
• Media Magic Audio16C (FCC ID: K2Y-AUDIO16C / K33IFISP16) - with Yamaha YMF262
• Oak Technology OTI-601 Mozart - with OTI-605
• Turtle Beach Tropez and Tropez 32 - with Yamaha YMF262 + ICS WaveFront 2115/2116
• Genoa Audio Blitz Stereo 16+ Model A3300 - with Yamaha YMF262 + OPTi MAD16
• Acer Magic S20 - with Yamaha YMF262 and OPTi 82C929A
• Toptek Golden Sound Pro 16ES (FCC ID: J5P-GS16ES) - with Yamaha YMF262 + TMC1659
• MultiWave AudioWave 16 AISP - with Yamaha YMF262 + Media Vision MVD121 and MVD201 Thunder Board chips
• miro miroSound PCM12 - with Yamaha YMF278 + OPTi 82C924. Also seen with AD1845 instead of CS4231.
• PAC Magic 93365-2 (FCC ID: IPLMAGIC) - with OTI-601
• Zoltrix Audio Plus 3200 AV500 - with C-Media CMI8328A
• Zoltrix Audio Plus 3200 V2 AV305 - with C-Media CMI8328A
• Terratec Profimedia 16/96 (Terratec Maestro 16/95) - with OPTi 82C924 + Crystal CS9233 wavetable
• Reveal SC400 - with Yamaha YMF262 and Aztech chip (it's a rebranded Aztech MMSN812)
• Behavior Tech BTC-1820

Revisions

Competition

 

In the Media

 

Setting it Up

Crystal wrote their own device drivers called "CrystalWare" for the CS-423x family and CS-4248. These were available for Windows 3.1 and Windows NT 3.5x.

Downloads

CS4231 Datasheet Nov 1993	CS4231A Datasheet Sep 1994	Driver Datasheet Nov 1993
CrystalWare Drivers v1.8, 14 Feb 1997 Extracted from the Turtle Beach Malibu driver disk, believed to be unmodified from the Crystal v1.8 reference drivers. This is designed for the CS4232 but may be useful for CS4231 also.	OS/2 Warp & Merlin Drivers v1.60, 25 Nov 1996 Compatible with CS4231, CS4232, CS4236, CS4237B, and CS4238B chipsets.