It was one of the first cards to have Microsoft DirectSound3D 4-speaker playback support. The Playback 1 channel should work in a similar fashion. The package will contain the following: In other projects Wikimedia Commons. The 4-speaker mode is only activated by software supporting the DirectSound3D quadraphonic mode.

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This page has been accessed 4, times. The chip was also a PCI bus master device that was designed to provide high-speed access to system RAM and resources, for sample synthesis data and effect processing.

However, according to the documentation, it was designed ensoinq be used as a software MIDI synthesizer channel. It was one of the first cards to have Microsoft DirectSound3D 4-speaker playback support. Pressure from intense competition, especially with the dominant Creative Labswas forcing audio card makers to try to keep their prices low.

This update supports the following products: Views Read View source View history. Creative Disc Detector Patch Filesize: TXT file for further details. After receiving an interrupt and filling the audio buffer, you must re-enable interrupts by clearing the interrupt enable flag in the Serial Interface audiopco, and then setting it again.

An oddity is that the rear channel was connected to the same output zudiopci as line input. For few soundcards feature multiple quartzes or a PLL, resampling is often used with all its potential problems. Retrieved from ” https: It was Ensoniq’s last sound card product before they were acquired by Creative Technology.


Ensoniq AudioPCI

The steps above use the Playback 2 channel to play PCM audio. One important feature of this chip was that it used the PCI bus, instead of the ISA bus commonly used by sound cards at that point. When programs took full advantage of the API’s capabilities, the ES was capable of both global spatial and audio;ci 3D sound effects, in both 2 and 4-speaker mode.

This mode allowed fast, direct access to the system’s entire RAM without requiring a memory manager or memory protection mechanism. In comparison to the wide ensoniqq of chips on and sheer size of the older Soundscape boards, the highly integrated two chip design of the AudioPCI is an obvious shift in design philosophy.

The main difference between the EV and previous chips was the inclusion of a built-in AC’97 codec hence producing a cheaper, single chip audio solution. Views Read Edit View history. In addition, the DOS driver required a memory manager such as EMM to be loaded, which not only required additional conventional memory space but also put the CPU into Virtual mode, conflicting with games that utilized a modified form of protected modecalled ‘flat mode’.

Ensoniq AudioPCI – Wikipedia

By setting the Frame Count register to play half of the audio buffer, you will receive an interrupt when the first half of the buffer has been played. If for some reason, you need to reinstall Disc Detector, run this patch again.

You are required to download the following packages. The jack switches modes if 4-speaker output became active. To ensure a successful installation, the card must be already installed on the system.


Resampling means lower sound quality, worse synchronization and possibly higher CPU utilization. This was made possible by the move to the PCI buswith its far greater bandwidth and more efficient bus mastering interface when compared to the older ISA bus standard.

The PCI Subclass and Revision registers can be used to detect exactly which model is installed, and each model has similar but not identical register sets. The Sample Rate Converter allows audio data to be converted to 48 kHz on the fly, and must be programmed with the proper values to perform the conversion from lower sample rates 8, 22, However, without actual hardware for FM synthesisFM music and sound effects were simulated using samples, often with unacceptable results.

The utility runs automatically. This process is not well documented in the Ensoniq spec sheets. The following pseudo-code is used to program the Sample Rate Converter to a specific sample rate. The Ensoniq ES audio chip was renamed Creative and revised into AC’97 -compliant variants, the ES and ES, and used for several more years on card and as integrated motherboard audio.