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Home > Hardware Reviews > Optical Storage > 8x CD-RW

Tuesday, February 19, 2002
Yamaha CRW8424S CD-RW

4. DAE Tests

Yamaha 8424S SCSI CDR-W - Page 4

DAE Tests

CD Speed  results :       (Speed : Bigger is better,  Seek Times : less is better, CPU Usage : less is better)

Dae Quality/ Accurate Stream

Speed (x)

Seek Time (ms)

CPU Usage (%)











Sync On

10 - Yes











Plextor PX-40TS DAE Graph (Sync on)

Various Rippers Results:

Test Method: I used CDFS.VXD & EAC v0.85 beta 4 to test audio capabilities. Eac reported that drive was capable of accurate stream but it aslo had "caching on"..So i compared the "Burst" vs "Secure Stream with caching" mode..

Tested CD: The Chemical Brothers "Dig Your Own Hole" - Track:  5 (Setting Sun)

Comparing Method:

- Ripped Track 5 of the CD with Drag & Drop (using CDFS) and with all the other CD Rippers.
- Edited all wavs with Hedit v2.0.04 and located the 2 following bytes (chosen randomly)
- Removed all previous bytes and saved.
- Then in a Dos window compared them using: FC /b x.wav y.wav

Programs Settings:

CDFS Driver v4.00.130: Drag  & Drop
EAC v0.85b: Burst & Secure Mode / Rip Speed Default / Allow speed reduction / Error correction medium


Average Speed
(Sync Data Transfer On)

(Sync Data Transfer On)

CDFS Driver v4.00.130

53 sec for 56.630kb= 7.12x

No clicks..No sec  lost..Seemed ok!

EAC v0.85b (burst)


No clicks..No sec  lost..Seemed ok!

EAC v0.85b (secure)


No clicks..No sec  lost..Seemed ok!

Comparing Results

CDFS Driver v4.00.130

EAC Burst

EAC Secure



After i also used Copy&Test Selected tracks. I marked all tracks and after i set Burst mode (max) for ripping speed i started test..(alternative way to check DAE quality..). Results were the same as before..All tracks ripped on max speed (9-15.7x) and all checksums were ok!..That means Yamaha 8424s is capable of doing up to 16x (max) DAE!!

Verdict of DAE Results:
Yamaha really re-designed 8424s and this showned on DAE tests..In start when i saw 16x DAE performance from specifications i thought. "Just another tipical number which will not be confirmed on real life. " However Yamaha managed to suprise me..All tests confirmed that Yamaha 8424s managed to reach <16x DAE performance. CDFS didn't worked so well with Yamaha 8424s since it only reached 7.12x. EAC secure mode (with caching) performed from 4x-4.5x however into last sec halted and average speed dropped on 3.0x. Maybe this is EAC problem. Eac Burst mode performed best giving up to 13.9x.

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