Wavelength Audio has USB DAC's - check out the site www.wavelengthaudio.com and see if that might work. I couldn't tell by just the quick glance, but it would be worth a look.
Hepl,
Yamaha has a 200GB hard drive recorder that writes to the drive in an uncompressed format. I got one, and when I figure out how to use it, I will put all my CD's on it.... |
Hepl (Hector) - yep, I've done the same using a smaller (250gb) external drive (smaller drive using Apple Lossless format). I use a Waveterminal U24 and am also very happy with the setup. But I was looking for a portable solution that didn't involve toting along the laptop and hard drive. I've tried the Airport Express, but didn't like it in comparison to the Waveterminal route, which works superbly with my DAC.
Audioengr (Steve) - A direct to DAC solution would be great too (as I think you are suggesting with the I2S route), but I'd be happy if I could just get a USB feed to my Waveterminal which would do the S/PDIF conversion. The USB docking dongle won't work as it's the wrong end (and I assume wrong direction) of the USB cable. Do you think it's possible to get a digital feed via USB to go to my Waverterminal, or would that require the chip you mention?
Marco |
Jax2,
I tought of the same, what I ended up doing is the following since as you said it the product doesn´t exist:
1. Burning all of my cds into a 1,000 GB external drive using the WAV format.
2. Using a Xitel Pro-Link from my laptop USB to send an optical cable (Kimber) to my Bel Canto DAC2 and into my system.
The optical connection sounds better that the coaxial, my feeling is that there is way too much digital noise inside the computer. Another option is to use an Apple Airport Express to send the data from your computer to your dac via the optical output (you will need to buy the Monster cable kit to get the 1/8 to toslink optical cable). Hope this will help.
Hector |
Hmm... I think I've heard the dock uses a line out that byplasses the audio amp in the iPod, but the iPod is still doing DAC duty. From what I gather, however, the amp in the iPod is pretty compromised, so the difference bewteen the headphone out, which uses the iPod amp, and the line out from the dock is pretty noticeable. Me, I use a highly suspect Nano with 128 kbps AAC files, just because the only time I ever listen to it is on the plane or on the metro. In either case, there is so much other ambient noise that the iPod is just kinda background music. |
Ed - I was only estimating based upon 600mb/CD in WAV (perhaps I'm off there. I'll have to see how many are actually on my iPod. Compression is about right though. My Alpine car rig is set up with a box that takes the iPod feed from its dock. I was thinking that that box was acting as a DAC since it is taking the feed from the iPod and running into an anlog input on the car deck. So naturally I thought there must be a way. Indeed, your thoughts were as mine: a kinder, more listenable iPod for traveling. My last trip I brought my MicroZotl and ran the analog inputs through the MZ then into a pair of Sony cans. The sound was MUCH better than straight off the ipod, but still left something to be desired in comparison to running the feed off my DAC when running a ALAC at home through the Waveterminal. There are much smaller headamps than the MicroZotl, several being made just for portable use, so yes, that's where my thinknig is going here.
Marco |
The iPod could probably be modded to bring-out a digital interface. I2S is probably available in there, but not S/PDIF, so a chip would have to be added to get S/PDIF. If it is too tight, the chip may not fit.
Steve N.
Empirical Audio
Manufacturer/modder |
Whups Marco, ya beat me to it.
You're only getting 170 CDs on 60GB w/ALAC? Seems odd. I thought I was running about 450MB per CD in WAV format, and thought ALAC was generally better than 2:1 compression over WAV.
Maybe I just listen to highly compressible music. Or short CDs. |
Elevick-
I wouldn't assume on an audiophile forum that the music on Marco's iPod is mp3 format... And, with a ALAC lossless compression at about 200 MB per CD, you can store about 300 CDs on a 60 GB iPod. More than enough for any airplane ride I'd be interested in taking...
Marco-
Have not yet seen any digital outputs for the iPod family. Its too bad too--with a little headphone amp, a waveterminal, some nice Grados, and one of those Pod 60 6Ah batteries, you would have a nice shoebox system. |
Elevick - Nothing on my iPod is in MP3 - to the mere suggestion of listening to anything compressed that way at all I'd say "why bother". I have a 60 gig ipod that holds my tunes in Apple Lossless. That's about 170 CD's which is certainly better than carrying around a box or folder with that many CD's and sorting through them every time I want to hear something in the car, or through headphones, or in a hotel, or at a friends house. It occured to me that the dock might have the potential for yielding a digital stream, but how do you tap into it other than connecting a laptop?
Marco |
Why bother?
The music on your ipod is most likely in mp3 format. A dac can't help with what signal is not there.
You will have to consider storing music in a lossless or uncompressed format first on the ipod and then worry about an external dac. The software even warns you before saving to the ipod that the format can not be changed back once converted. That's because it is cutting out certain "stuff". However, how much can fit on a 40-60 gig ipod anyway? |
Marco
As wonderfully fun and convenient as the iPod is, there always seems to be some nagging issue that prevents it from becoming a true audiophile device.
Good luck with this, and I, too, will be excited to see if any fellow Agoners can crack the code. |
