[FIIO DM13] HiFi Balanced Output Portable Stereo CD Player DM13 Is Officially Released!

[NavReth]

My experience was that pressed CDs skipped in both v25 and v27, so neither were usable.

I definitely had occasional intermittent skips. I meant moreso hard skips. The last 2 seconds of every track on multiple CD-Rs I have gets cut off. On v25, the first second of every CD wouldn't play. On v25 (haven't tested v27 because frankly, if CD-Rs don't work there's no point), enhanced CDs got read as data CDs and would have gaps on every track.

All 3 of these CD formats have a contiguous stream of audio data on the disc. Even if you're constructing a buffer to play out of, it should be possible to just keep throwing audio onto the end of the buffer until the disc is complete. I don't understand why the players have all these seemingly track specific issues when you should be able to just play the CD as one big song (unless I'm fundamentally misunderstanding the mechanics of a CD).

 

[FiiO Willson]

The reading of CD-R and CD-RW is limited by a number of factors: the quality of the CDR, the quality of the original recorded music, the quality of the recorded optical head, and the CD player's optical head's ability to read this format, as well as the quality of the CD player's optical head.

I know that there are many brands of CD players that can't even read CD-R, as well as CD-RW, and we, as a first time CD player manufacturer, have spent a lot of time and effort on CD-R reading.

I think we'll add some clarification where the DM13 detailed parameters are to make these things clear so that people don't have too high expectations

 

[NavReth]

The reading of CD-R and CD-RW is limited by a number of factors: the quality of the CDR, the quality of the original recorded music, the quality of the recorded optical head, and the CD player's optical head's ability to read this format, as well as the quality of the CD player's optical head.

I know that there are many brands of CD players that can't even read CD-R, as well as CD-RW, and we, as a first time CD player manufacturer, have spent a lot of time and effort on CD-R reading.

I think we'll add some clarification where the DM13 detailed parameters are to make these things clear so that people don't have too high expectations

But again, this wasn't a problem in v25. It was specifically a v27 regression. It's worked before. I don't know what changed. Going back to v25 made CD-R work perfectly.

Edit: And to be clear. These are FLAC quality audio files burned in audio CD format to a CD-R.

 

[aceedburn]

But again, this wasn't a problem in v25. It was specifically a v27 regression. It's worked before. I don't know what changed. Going back to v25 made CD-R work perfectly.

Edit: And to be clear. These are FLAC quality audio files burned in audio CD format to a CD-R.

Exactly why I said that FiiO has to revamp their software team. They are missing out on key changes made in a previous version when they release a new version and vice versa. Their software is their fault, not the hardware.

 

[FiiO Willson]

But again, this wasn't a problem in v25. It was specifically a v27 regression. It's worked before. I don't know what changed. Going back to v25 made CD-R work perfectly.

Edit: And to be clear. These are FLAC quality audio files burned in audio CD format to a CD-R.

I understand the situation you are talking about.

The fact is that the reading of CD disks is a balance issue similar to that of a scale. I used to have the same problem with OPPO. There are always trade-offs for individual extremes. The balance of various conditions and situations in terms of technology, market, and improvements.

CD/DVD players, which are a combination of mechanical and optical products, need to be constantly optimized and improved, and even at the height of CD/DVD players, the best CD players still couldn't read all the discs perfectly, which is a big difference from today's digital players!

For you, if you think the V25 firmware is better, I personally recommend you to brush back again.

 

[aceedburn]

I understand the situation you are talking about.

The fact is that the reading of CD disks is a balance issue similar to that of a scale. I used to have the same problem with OPPO. There are always trade-offs for individual extremes. The balance of various conditions and situations in terms of technology, market, and improvements.

CD/DVD players, which are a combination of mechanical and optical products, need to be constantly optimized and improved, and even at the height of CD/DVD players, the best CD players still couldn't read all the discs perfectly, which is a big difference from today's digital players!

For you, if you think the V25 firmware is better, I personally recommend you to brush back again.

But why was it working well in v25 and is a problem in v27? What was changed in the firmware to remove or cripple this functionality? Surely it can be fixed via a new firmware?

 

[FiiO Willson]

But why was it working well in v25 and is a problem in v27? What was changed in the firmware to remove or cripple this functionality? Surely it can be fixed via a new firmware?

As I said above.

Individual extremes are always trade-offs. The balance of various conditions various situations in terms of technology, markets, and improvements.

I also see what you said about software issues, we do have bugs in our software, but there is a fact that software and hardware do still differ. More features means more probability of software problems. Often times even one letter and punctuation mark in software is different and can have completely different results.

Software can never be problem-free, unless it is a particularly simple product.
Hardware is actually the same, there may be some problems people can not find.
As a product manager, we need to make decisions at various times, and most of the problems we test engineers find require us product managers to make trade-offs and release them. We need to solve the first problem to be solved, part of the extreme situation, perhaps at a later time to solve.

I hope you understand all of the above, these are the facts