Traxmod Open Source SD player

[jean-paul]

When searching for the SD card player on the picture above I found this lossless sd card player that might be interesting as well:

http://www.k9spud.com/traxmod/

[Hisatugo]

The SD-card player is not a simple building block that solves all problems associated with digital audio sources. Everything must still be maticulously tuned ...

Oh, I do realized that on second reading of this thread... You´re right - will follow your advice.

I think even to get two players, as if I decide to modify one, still have the other intact..



Thanks... I´m still in line for the player.

Regards everyone.

Hisatugo

[jkeny]

Good find Jean-Paul - I wonder has anybody here heard this player?

[EUVL]

I knew about this for quite a while (2-3 months).

In the previous versions, the player was meant to play MOD files in the first place. It seems that since he changed over to dsPIC3x family, the emphasis has been placed on WAV files at 44.1kHz.

http://www.k9spud.com/wiki/TRAXMOD:F...have_an_LCD.3F

Still, not sure by incorporating too many functions like FLAC and later MOD decoding, performance is not compromised. Also seems only to support 2GB SDs.

http://www.k9spud.com/forum/read.php...,2498#msg-2498

(Different emphasis...?)

I think Koon's solution is still the simplest, but stagnant. But Traxmod may have much better support and constant update, and is very much alive.

Should keep an eye.


Patrick

[scott wurcer]

Looks like a nice open source project. They seem to be optimizing for low power at the expense of other things.

[EUVL]

Yes, but I think if the code can be adapted for best performance (rather than versatility), the rest (hardware, layout, whatever audiophile stuff, etc.) we can do ourselves.

I hope the moderators can splitt the last4-5 posts off to a separate Traxmod thread, so that we don't hijack John's.

I'll write to him (k9spud) and see whether he'll help us.


Patrick

[EUVL]

> I'll write to him (k9spud) and see whether he'll help us.

Done.

[jean-paul]

Originally posted by scott wurcer
Looks like a nice open source project. They seem to be optimizing for low power at the expense of other things.

After reading the information I can not conclude that they optimize for low power at the expense of other things or it should be the missing backlight LEDs for the LCD. What I do see is that ( besides FLAC compatibility ) low power consumption is one of the primary design goals which by now should be standard design practice Energy is a valuable thing in 2009.

I guess the author got fed up with portable gear not working ( and also not being portable as it has to be connected to a charger ) at the time you want to use it. For some reason I can fully understand that frustration.

Just look at, for example, mobile phones. They can do all kind of tricks but the modern ones have a depleted battery in less than 1 day.... My old one with black and white screen and no camera has a battery that lasts for over a week. What is the use of color screens and cameras when your battery is empty

[jkeny]

Yes this would be a good project to take in the direction of an audiophile version of this player.
So what would we need to do
- take out all code dealing with playback of MOD audio files
- add in code for WAV playback
- look at the hardware for inclusion of low jitter clock & clean power supplies
- maybe modularise it so as to be able to use a selection of DACs
- I would be interested in future ethernet support as it could allow for a useful interface

[scott wurcer]

Originally posted by jean-paul


Energy is a valuable thing in 2009.

Tell that to Nelson Pass . I guess I meant that some playback quality issues were not as important as portability and battery life.

BTW PIC has free TCP/IP stack so Ethernet is a real possibility.