Ensoniq AudioPCI met Creative ES1370

The Ensoniq AudioPCI is a Peripheral Component Interconnect (PCI)-based sound card released in 1997. It was Ensoniq’s last sound card product before they were acquired by Creative Technology. The card represented a shift in Ensoniq’s market positioning. Whereas the Soundscape line had been made up primarily of low-volume high-end products full of features, the AudioPCI was designed to be a very simple, low-cost product to appeal to system OEMs and thus hopefully sell in mass quantities.

Ensoniq/Creative ES1371 and ES1373 (AudioPCI 97) are AC’97-compatible versions.
Sample sets: 2, 4, and 8 MB sets
128 General MIDI sample-based instruments, 61 drum programs, 128 MT-32 instruments, Roland GS Sound set in 4 & 8 MB sets

Synthesizer: Up to 32 simultaneous voice polyphony, 16 MIDI channels
Digital effects: reverb, chorus, and spatial enhancement

OPL-FM and MPU-401 emulation (using the sample synthesis engine; FM emulation was inauthentic at best)
Digital audio
16-bit record & playback at up to 48 kHz (mono/stereo). A/D D/A codec
Lowest Noise: >Signal-to-noise ratio 90 dbr typical. Frequency response: 20 Hz – 22 kHz
Full duplex operation (simultaneous record/playback)
S/PDIF and I²S output — ES1373 only.

Supported standards. 100% DOS legacy game compatible (allegedly; some games fail to detect the virtualized hardware and/or clash with Virtual-86 mode):
ENSONIQ Soundscape, Microsoft Direct Audio (DirectX), OpenAL, Sound Blaster Pro (2), General MIDI, MT-32 (although with different instrument sounds), AdLib/FM (simulated via sample-synthesis), MPC 1,2,3

Drivers: DOS, Windows (3.1, 9x, NT 4.0, 2000, XP), FreeBSD, Linux; Creative provided WDM drivers for Windows 98 SE and later

The CT5880 chip is a relabeled ES1371, may be found on some cheap cards i.e. SB Creative VIBRA 128 PCI.