Windows 9x/Me. WDM drivers for these operating systems and later Windows 2000/XP may lack important mixer controls, like separate Line-Out and 3D Wide. Legacy mode is not supported under NT-based OSes. The original version of the DS-XG chipset series is the YMF724. It is limited to two-channel output. It is followed by the YMF744 and its variants, which feature four-channel output. The final and most advanced version of the YMF7x4 chipset series is the YMF754, which also features standard four-channel output, but adds lower power consumption features. The most feature-rich soundcards based on the YMF754 are the Labway XWave 6000 (which has an additional hardware chip to emulate 5.1 surround sound and a six-channel amplifier providing 2W per channel) and the Hoontech SoundTrack i-Phone Digital XG (which features an additional connector for an included speech-optimized headset microphone as well as support circuitry that limits feedback in telephony applications). The DS-XG .vxd drivers under Windows 95, 98, 98SE or ME can switch to Sondius-XG which allows emulation of the VL70-m tone generator (except for the distortion block). Models YMF724 (DS-1): First model using PCI bus. Includes 64-voice wavetable synthesizer (total 73 concurrent audio streams supported), interface to AC'97 codec, S/PDIF output, Dolby AC-3 decoder. YMF738: Integrated Sensaura 3D audio, AC'97 2.1 interface. YMF740C (DS-1L): Based on YMF724, but includes only 32-voice wavetable synthesizer (total 41 concurrent audio streams supported). It also lacks the S/PDIF and AC-3 interfaces in YMF724. YMF744B (DS-1S): PCI 2.2-compliant, fully 3.3V power processor based on YMF724, it adds support of ZV port, secondary AC '97 2.1 CODEC. YMF754 (DS-1E): Based on YMF744, it adds simultaneous usage of ZV port and S/PDIF input, 2.5V power for core logic and PLL filter, mixing SPDIF input from mixer without prior sample rate conversion. AC-XG family The AC-XG family features AC'97 codec. YMF725: AC'97 codec for use with YMF724. YMF743: AC'97 2.1 stereo codec. YMF752: AC'97 2.1 stereo codec with sample rate converter. YMF753: AC'97 2.2 stereo codec based on YMF743. References External links Yamaha LSI driver page OPL series YMF701 datasheet YMF711 datasheet YMF715 datasheet YMF715E datasheet DS-XG series YMF724 specification datasheet (PDF) YMF744 specification datasheet (PDF) YMF754 specification datasheet (PDF) YMF740 datasheet Frequently Asked Questions about YMF7x4 (Russian). Archive copy at the Wayback Machine. AC-XG series YMF752 datasheet Yamaha AC-XG pages: YMF743, YMF753 YMF724F-V specification datasheet (PDF) Sound chips Yamaha music products