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Macintosh Quadra 840AV
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== Audio Capabilities == The Quadra 840AV was the first Macintosh to include on-board 16-bit 48 kHz stereo audio playback and recording capability.<ref>{{cite web |url=https://en.wikipedia.org/wiki/Macintosh_Quadra_840AV |title=Macintosh Quadra 840AV |publisher=Wikipedia |access-date=2026-02-10}}</ref> Features include: * 16-bit stereo input and output * 48 kHz sample rate * DSP-accelerated audio processing via AT&T DSP 3210 * PlainTalk speech recognition (first Mac to support this out-of-the-box)
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