ESS Maestro 1 free download

File name ESSmaestro1.pdf

PRELIMINARY Maestro-1TM AudioDrive® Solution Product Brief DESCRIPTION The Maestro-1TM PCI audio accelerator is part of ESS Technology's new generation of architecture that not only meets the demands of advanced PC audio applications, but also enables the integration of a complete multimedia subsystem on either a single adapter or motherboard. Maestro-1's functionality and interfaces are compliant with all major industry standards, including the Audio Subsystem Specification of PC97, Windows® 95 DirectSoundTM, Windows® Sound System® , AC'97 CODEC Interface, and PCI 2.1 Bus Specification. The dual audio-engine Maestro-1 architecture consists of a 64voice, pipelined, wavetable synthesizer and a proprietary programmable audio signal processor. Together they can simultaneously and efficiently handle multiple audio streams of different data types, high-quality music synthesis, and voice compression and decompression. The Maestro-1 provides a high-performance PCI interface, while retaining full compatibility to existing DOS games through hardware emulation. The PCI bus is required for PC audio hardware to smoothly reproduce high-fidelity audio from Internet, MIDI, wave, and conferencing sources. The PCI bus achieves high-performance functionality by enabling the transfer of multiple, independent data streams. PCI improves data transfer efficiency by at least 20 times over the ISA bus. This is crucial for low-latency audio applications, such as Internet interactive audio. Microsoft's DirectSound API is accelerated by digitally mixing up to 32 PCM streams of any frequency down to a single output stream of 48 kHz. Hardware acceleration frees the CPU to perform other tasks, such as video processing. The Maestro-1's Wave Processor (WP) provides high-quality wavetable synthesis cost-effectively by storing the downloadable table samples in system memory. With ESS's WaveCacheTM technology, the samples are retrieved using the PCI bus during playback. Each channel/stream has an independent pan, tremolo, vibrato and tone filter. The synthesizer also performs advanced audio effects such as reverb, chorus, flange, echo and 3-D spatial enhancement. The Maestro-1 achieves complete DOS game compatibility through three major schemes: PC/PCI DMA, Distributed DMA, and Transparent DMA. Transparent DMA requires no sideband signals and is compatible with all Pentium® and Pentium Pro® chipsets with no constraints. The Maestro-1 audio accelerator is available in an industrystandard 208-pin Plastic Quad Flat Package (PQFP). FEATURES W DOS game compatibility System Interface W W 32-bit PCI Bus master, PCI 2.1 compliant < 0.5% PCI Bus Bandwidth for playing 16-bit/stereo/44.1KHz Wavetable Synthesis W W W W 64-channel 50 MHz pipelined Wave Processor 1-8 MB Wavetable Memory downloadable in either system memory or local ROM/DRAM/FlashROM Programmable pan, tremolo, vibrato, rate conversion and tone filtering per channel Programmable effects including reverb, chorus, flange, e