Hi Richard,
The jitter meter is fed from the RF (or eye pattern) test point via a scope probe. The Leader gives you two pieces of important information. The amplitude of the signal and the amount of jitter is contained in that signal. When you make adjustments, most will make the amplitude higher, and will also reduce the amount of jitter. The meter allows you to quantify the performance of the transport unit. The other instrument that we had to create was a BLER meter. It was connected to the C1 & C2 outputs and frame signal that sets the start and stop signals for a count. The error count starts and is totalled by these signals, and the counter reset. The reduction in jitter coincides with the lower BLER rate. As for the reference to the C1 and C2 error flags, that's what old timers like me had access to back then.
-Chris
The jitter meter is fed from the RF (or eye pattern) test point via a scope probe. The Leader gives you two pieces of important information. The amplitude of the signal and the amount of jitter is contained in that signal. When you make adjustments, most will make the amplitude higher, and will also reduce the amount of jitter. The meter allows you to quantify the performance of the transport unit. The other instrument that we had to create was a BLER meter. It was connected to the C1 & C2 outputs and frame signal that sets the start and stop signals for a count. The error count starts and is totalled by these signals, and the counter reset. The reduction in jitter coincides with the lower BLER rate. As for the reference to the C1 and C2 error flags, that's what old timers like me had access to back then.
-Chris
I think people just dont like how it sounds and think up some reason. I tried and didnt find the data an issue also. But some players still sound different.... is it true as Benchmark eng says... most differences are in the analog area IHO.
Never-the-less, the high sampling rate and bits do give better audible results over 16/44.1
-RM
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Try Dow Corning High Vacuum Grease (976V) around the middle-outer half of the surround. That will give you an idea of things to come. tell me what you heard change after wards and maybe see difference in data.
THx-RNMarsh
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Thanks. I thought you might be meaning some kind of thinned glue that the EnAbl guys talk about...
You're welcome, it reminds me of another quote I quite well like:
(Who did some amazing research, credit where due)
Poe's law strikes again! Sorry.
When I asked if I replaced my drives faster than they wore out I didn't say how often I do replace them, now did I? 🙂
Agreed, but after children have been around some CDs are extreme cases. I've had a couple that wouldn't play that EAC saved after about an hour of chewing on them. But for anything else the report is zero errors.
It's a bit command liney and there are different versions of EAC
EAC and FLAC - Hydrogenaudio Knowledgebase should give you pointers you need. Otherwise ask and I'll check my setup.
Saw this last night Parks Audio
Manual might be easier to scan than nasty website http://parksaudiollc.com/assets/files/puffmanV1.pdf
DSP phono for $400. Now as his previous product was a tube phono his fans are up in arms , but I think he has completely missed the point with this one. Interested in what others think.
(note that I have specc'd up what my digital phono appliance would need to do and realised it would be an expensive beasty).
Manual might be easier to scan than nasty website http://parksaudiollc.com/assets/files/puffmanV1.pdf
DSP phono for $400. Now as his previous product was a tube phono his fans are up in arms , but I think he has completely missed the point with this one. Interested in what others think.
(note that I have specc'd up what my digital phono appliance would need to do and realised it would be an expensive beasty).
It does everything one wants.
Only they should provide a digital output as well
George
Good morning Richard,
If you look in the CD player you should see a test point called "RF" or "EYE". It will be in the RF amp area. You can also find it by probing around that area, look for some resistors and low value capacitors that form the feedback network for the RF amp. Some CD players have this point on the PCB on the mechanism and may bring the RF signal to the main PCB on the flex cable, or small, flexible wire harness that goes between the RF amp PCB and the main PCB. Just probe looking for the RF signal. You probably will want to set your scope for 0.5 / div and 0.5 uS/ div, AC coupling as there will be an average DC level there as well for many players.
In the event that there isn't a test point, or it's under the transport, solder a wire bit to the pads and clip on to that. In new players, I have seen the RF amp, Servo amp and controller and DSP all on the same chip. Your only hope then is to find the feedback network for the RF amp and make a test point. If you look the chip up and get a pin diagram, all the information should be there for you. Again, just look for the RF amp portion. Your test point will be on the RFO pin (RF out).
Good luck Richard, Chris
If you look in the CD player you should see a test point called "RF" or "EYE". It will be in the RF amp area. You can also find it by probing around that area, look for some resistors and low value capacitors that form the feedback network for the RF amp. Some CD players have this point on the PCB on the mechanism and may bring the RF signal to the main PCB on the flex cable, or small, flexible wire harness that goes between the RF amp PCB and the main PCB. Just probe looking for the RF signal. You probably will want to set your scope for 0.5 / div and 0.5 uS/ div, AC coupling as there will be an average DC level there as well for many players.
In the event that there isn't a test point, or it's under the transport, solder a wire bit to the pads and clip on to that. In new players, I have seen the RF amp, Servo amp and controller and DSP all on the same chip. Your only hope then is to find the feedback network for the RF amp and make a test point. If you look the chip up and get a pin diagram, all the information should be there for you. Again, just look for the RF amp portion. Your test point will be on the RFO pin (RF out).
Good luck Richard, Chris
Hi Scott,
The two you mention both do multiple passes and pattern matching as well as backing the SV (Surface Velocity) down and retrying to ensure accurate reads. There have in the past been rippers which command the drive in RAW mode, so whatever spins under the pickup at max speed is what the output stream gets, errors and all.
Cheers,
Howie
The Leader unit I use has 50 ohm inputs, so I built a little single opamp buffer I use when I use it as test equipment. On the Philips player I modified to do disc analysis I built the EFM buffer into the player and put a BNC on the back panel.
In the player you identify the EFM test point to tap the signal. It is usually immediately after the photodiode array amp.
Cheers,
Howie
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If you are using Revision 1.3 from 2, Drop down EAC>Compression Options>External Compression>check "Use external program for compression", put the path to the flac,exe in the box provided. On my system it is:
C:\Program Files (x86)\Exact Audio Copy\FLAC\FLAC.EXE
Cheers!
Howie
IIRC, seems to me that data CDs have an extra layer of error correction and audio CDs don't have. It's been awhile though, anybody know for sure?
I use DBpoweramp. It costs a little but its been really useful and has all the rip and conversion capabilities without the overhead. When converting from formats its impressive to watch as it uses all the cores st once. It supports accurate rip.
It was a real question. If it this this smartphone's chinese manufacturer, that I found via Google, they are not known on the European market yet.
Hi Mark,
The error correction and detection is entirely different on a data CDROM than a music CD. It is much more tolerant of errors than the audio Reed-Soloman code used in audio CDs.
-Chris
The error correction and detection is entirely different on a data CDROM than a music CD. It is much more tolerant of errors than the audio Reed-Soloman code used in audio CDs.
-Chris
I understand that, just making the point that it's not a problem with one solution. Foobar works for me and SoX writes any imaginable format. I have no CD players anymore.
BTW foobar's net speed is several times normal on every CD I have tried. I do have lots of old DVDR's that neither play nor rip.
OPPO is both. The have no phone presence in the US for phones either. One plus is part of OPPO.
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