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Stereophile Jan 2009 เด็ดมาก เทียบ jitter ให้ดูกันจะ !! ใครใช้เครื่องไหนกันเทียบกันเอาเอง 
เขาสรุปประวัติศาสตร์เรื่อง jitter ในวงการนักฟังออดิโอไฟล์ให้ด้วยล่ะ
Krell Evolution 505 SACD/CD player, $10,000
The Evolution 505's noise floor looks double-humped around the fundamental (fig.11), suggesting that some modulation noise is present. As I wrote at that time, low-frequency noise modulation can be audible.
McIntosh MS750 media server, $6,000
The averaged level of the noise in this graph is around 12dB higher than the 16-bit noise floor, suggesting closer to 14-bit performance than the necessary 16-bit.
Apple iPod G3, $400
While the third-generation iPod's noise floor is around 6dB higher than is theoretically possible from a 16-bit system, presumably a result of the low rail voltages available for the DAC and output stage, only a few sidebands can be seen above the noise in fig.8.
The overall result is superbly low, at 225ps peakpeak, and this long-obsolete iPod is actually better in all respects than the 2008-vintage iPod Touch I tested.
อ่านต่อเอาเอง >> http://www.stereophile.com/features/...er/index1.html
ขอปักหมุดได้มั๊ยเนี่ย กระทู้นี้
เขาสรุปประวัติศาสตร์เรื่อง jitter ในวงการนักฟังออดิโอไฟล์ให้ด้วยล่ะKrell Evolution 505 SACD/CD player, $10,000
The Evolution 505's noise floor looks double-humped around the fundamental (fig.11), suggesting that some modulation noise is present. As I wrote at that time, low-frequency noise modulation can be audible.
McIntosh MS750 media server, $6,000
The averaged level of the noise in this graph is around 12dB higher than the 16-bit noise floor, suggesting closer to 14-bit performance than the necessary 16-bit.
Apple iPod G3, $400
While the third-generation iPod's noise floor is around 6dB higher than is theoretically possible from a 16-bit system, presumably a result of the low rail voltages available for the DAC and output stage, only a few sidebands can be seen above the noise in fig.8.
The overall result is superbly low, at 225ps peakpeak, and this long-obsolete iPod is actually better in all respects than the 2008-vintage iPod Touch I tested.
อ่านต่อเอาเอง >> http://www.stereophile.com/features/...er/index1.html
ขอปักหมุดได้มั๊ยเนี่ย กระทู้นี้
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