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发表于 2013-2-3 11:39:46
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原帖由 smilence 于 2013-2-3 11:33 发表 
有点不太理解，这里不就是用cpu么。而且你说的dsp芯片，一般都是dac里面在做了。
比如vega，比如bricasti m1
我也搞不大懂，但是看维基和Avid论坛，似乎Protools HD的控制不是CPU处理的，和普通的PCHIFI有本质区别：
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Pro Tools|HD systems represent the high-end professional product line. They rely on dedicated DSP processor chips that perform the audio processing in conjunction with rack-mounted interfaces, which will handle the outgoing and incoming audio, MIDI, and sync connections. The DSP cards are connected to the interfaces with a proprietary DigiLink cable.[12] While the DSP cards are manufactured exclusively by Avid Audio (formerly Digidesign), interfaces from numerous manufacturers feature DigiLink connectors.
Pro Tools systems have long relied on dedicated DSP cards to handle most audio processing, due to the fact that at the time Pro Tools was first developed, consumer-level computers were not powerful enough to process high-end digital audio.[13] An HD Core PCI card or an Accel Core PCIe card is required in a HD 1 system; the inclusion of one or two additional Accel cards upgrades the system to HD 2 or 3 respectively, and increases the system's overall processing power, allowing for higher track counts and more plug-ins. An 'Expansion HD' product increases capability up to a total of 7 cards using Digidesign's PCI-X expansion chassis product, which is available with both PCI-X and PCIe host cards for the computer.” |
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