Gazjam;578355 Wrote: > thanks John, good info as always. > > Need to check up WHICH usb implementation my Caiman has... > I dont have a lot of 24/96 stuff, so might be worth investigating as a > possible tweak. > > Whats the "good" usb implementation to look for John? > (I can probably ask the Dac designer direct on another forum..) > > Sorry!
John?(or other USB experts?) Can I bother you to scan your eye over this please, just a general recommendation if you would? The USB chip in my Dac is THIS one: PCM2902E Specs: SINGLE-ENDED ANALOG INPUT/OUTPUT AND S/PDIF – Pass-Band Ripple = ±0.1 dB 234· PCM2900: Without S/PDIF – Stop-Band Attenuation = –43 dB · PCM2902: With S/PDIF – Single-Ended Voltage Output · On-Chip USB Interface: – Analog LPF Included – With Full-Speed Transceivers · Multifunctions: – Fully Compliant With USB 1.1 Specification – Human Interface Device (HID) Volume ± – Certified by USB-IF Control and Mute Control – Partially Programmable Descriptors (1) – Suspend Flag – USB Adaptive Mode for Playback · Package: 28-Pin SSOP – USB Asynchronous Mode for Record – Bus Powered · USB Audio Speaker · 16-Bit Delta-Sigma ADC and DAC · USB Headset · Sampling Rate: · USB Monitor – DAC: 32, 44.1, 48 kHz · USB Audio Interface Box – ADC: 8, 11.025, 16, 22.05, 32, 44.1, 48 kHz · On-Chip Clock Generator With Single 12-MHz Clock Source The PCM2900/2902 is Texas Instruments' single-chip · Single Power Supply: 5 V Typical (VBUS) USB stereo audio codec with USB-compliant · Stereo ADC full-speed protocol controller and S/PDIF . The USB protocol controller works with – Analog Performance at VBUS = 5 V no software code, but the USB descriptors can be – THD+N = 0.01% modified in some areas (e.g., vendor ID/product ID). – SNR = 89 dB The PCM2900/2902 employs SpAct™ architecture, – Dynamic Range = 89 dB TI's unique system that recovers the audio clock from USB packet data. On-chip analog PLLs with SpAct – Decimation Digital Filter architecture enable playback and record with low – Pass-Band Ripple = ±0.05 dB clock jitter and with independent playback and record – Stop-Band Attenuation = 65 dB sampling rates. – Single-Ended Voltage Input – Antialiasing Filter Included – Digital LCF Included · Stereo DAC – Analog Performance at VBUS = 5 V – THD+N = 0.005% – SNR = 96 dB – Dynamic Range = 93 dB – Oversampling Digital Filter http://nl.mouser.com/Search/ProductDetail.aspx?qs=wgAEGBTxy7mJPSH2QDmALg== Thanks! -- Gazjam ------------------------------------------------------------------------ Gazjam's Profile: http://forums.slimdevices.com/member.php?userid=18604 View this thread: http://forums.slimdevices.com/showthread.php?t=82110
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