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SanDisk User
Posts: 49
Registered: ‎12-01-2008

Re: DIY Line Out Cable - Works!


14124all wrote:
Griffin Dock does not have a lineout? http://www.griffintechnology.com/products/docksansa What does it say in the upper left corner below the pictures? This has become an endless circle - enough said. Need to move on to Fuze cable improvements and a possible interesting find inside the Clip.

 

LOL, What the big print giveth, the small print taketh away....   check out the 3rd bullet under "Features" .  Griffin is aware of what a line out is, but in the "Features" they refer to it for what it is, is an "audio out"..... and printed on the Dock itself are the words "Audio Out," not line out.  Smiley Happy

 

Anyway, untold numbers of us have listened to headphones plugged into the Griffin docks with no deleterious effects, and if the "Audio-out" was not supposed to be used by headphones, don't you think Griffin would mention that?

 

On to the Clip:  What did you find?  Come on, don't keep it a secret.  Smiley Happy

 

axon

 

PS:  even though we can't change the volume any more when the Fuze is docked, the equalizer still works. 

SanDisk Fanatic
Posts: 363
Registered: ‎08-02-2008

Re: DIY Line Out Cable - Works!

HAH! Shoot me right back LOL! I think it is just confusing labeling. The fact is that the dock uses the Fuze lineout signal. I agree that it is not true lineout, but it is at lineout level and it is what the Fuze has available from the SOC IC. You probably won't find a true lineout in any of the current MP3 players due to the EQ being adjustable. Cowon and maybe older iRiver might have them with fixed flat EQ.

If enough people want the volume control maybe Sansa will reactivate it. I see the main problem as being someone plugging in older large 8 ohm headphones, or a speaker set that is meant to run off of a headphone out signal instead of lineout signal. Either of these could draw too much current and pop the Fuze!

Clip info will be given if I find something worth reporting. Right now it is a couple of board traces that I need to find out where they go.

8GB Blue FUZE w/The Original DIY Lineout Cable and AT Button H-Phones Fitted To AT WM5 Headband:All Custom Built
Newbie
Posts: 13
Registered: ‎12-28-2007

Re: DIY Line Out Cable - Works!

[ Edited ]

True lineout or not, by using the lineout signal from the Fuze you are bypassing the internal amp don't you? That's the whole purpose of making the cable isn't it? I would get the Griffin Dock but what's the point if it has an amp of it's own?

 

Hurry up 14124all! You'll make history! Smiley Tongue

 

Message Edited by Peyotero on 12-24-2008 11:29 AM
SanDisk User
Posts: 49
Registered: ‎12-01-2008

Re: DIY Line Out Cable - Works!


Peyotero wrote:

True lineout or not, by using the lineout signal from the Fuze you are bypassing the internal amp don't you? That's the whole purpose of making the cable isn't it? I would get the Griffin Dock but what's the point if it has an amp of it's own?

 

Hurry up 14124all! You'll make history! Smiley Tongue

 

Message Edited by Peyotero on 12-24-2008 11:29 AM

The Griffin Dock does not have a built in amplifier and if you've been following the thread, the line out signal is exactly the same as the headphone jack signal.... but don't worry, it doesn't matter, the sound quality is fantastic.

 

axon

SanDisk User
Posts: 46
Registered: ‎08-20-2008

Re: DIY Line Out Cable - Works!

[ Edited ]

"The Griffin Dock does not have a built in amplifier and if you've been following the thread, the line out signal is exactly the same as the headphone jack signal.... but don't worry, it doesn't matter, the sound quality is fantastic."

 

You keep repeating that, but the Sansa Rep keeps telling you otherwise - as well as the specs that have been shown for the sound chip.  I guess it's up to the reader to decide which source is more credible.

Message Edited by PolloLoco on 12-25-2008 11:41 AM
SanDisk User
Posts: 49
Registered: ‎12-01-2008

Re: DIY Line Out Cable - Works!


PolloLoco wrote:

"The Griffin Dock does not have a built in amplifier and if you've been following the thread, the line out signal is exactly the same as the headphone jack signal.... but don't worry, it doesn't matter, the sound quality is fantastic."

 

You keep repeating that, but the Sansa Rep keeps telling you otherwise - as well as the specs that have been shown for the sound chip.  I guess it's up to the reader to decide which source is more credible.

Message Edited by PolloLoco on 12-25-2008 11:41 AM

PL, I believe you are misinformed.

 

I think all you have to do is plug into the output of the headphone jack at full volume and then the output of the Griffin dock to discover that they are the same volume.

 

One would assume that if there was amplification in the Griffin dock, the dock would be louder than the headphone out.

 

What sansafix said was that the line out of the Fuze is the same as 100% volume out of the headphone jack.

 

What I'm telling you is that the line out of the Griffin dock is the same volume as 100% volume out of the headphone jack.

 

If you have information to the contrary regarding the Griffin dock, please don't keep it to youself,  quote it here so that we all might benefit from it.   Smiley Happy

 

axon

Newbie
Posts: 4
Registered: ‎12-15-2008

Re: DIY Line Out Cable - Works!

Well I finished my line out cable -> car stereo project and it works great.  For the cable, I just rewired an existing Sandisk cable.  The cable provides 5 V for charging, and audio on the green and white USB data wires.  On the cable's circuit board, I cut the traces between the pins and the green and white wires, and re-routed those wires to the audio pins (27 and 28).  Also tied pin 7 to pin 22 to enable the audio.  I run 5 V into the red wire and use the cable shield as its ground return path, while the black wire is the ground reference for the two audio wires.  I found that it is important to keep the audio ground wire separate from the charging ground (although they are tied together in the Fuze), because otherwise a lot of noise shows up in the audio.  This works because my car stereo has + and - inputs both isolated from ground, so the black wire is tied to the - inputs for both channels and the green and white wires go to the separate channels' + inputs.

 

The cable of course no longer functions as a computer sync cable.

 

I built a little circuit board with a 5 V regulator and heat sink, and a USB Type A receptacle, which fits right under the stereo.

 

I like how the latest FW disables the volume control.  Now there's no danger of messing up the headphone audio level accidentally.  Sansafix, if you're listening, I'd like to recommed disabling the equalizer when line out is enabled.  Equalization should be the job of the system you're driving with the Fuze.  I'd like one equalizer setting to compensate for headphone deficiencies, and a flat output for line out, without having to manually change the settings when switching back and forth between the two.

 

Waino

SanDisk Guru
Posts: 1,235
Registered: ‎10-24-2007

Re: DIY Line Out Cable - Works!

Meh,  just set the eq to normal before connecting the cable.
SanDisk Fanatic
Posts: 363
Registered: ‎08-02-2008

Re: DIY Line Out Cable - Works!

Waino, Nice job on the lineout cable and car specific to boot!!! It's nice to see that someone else likes to tinker with this stuff!
8GB Blue FUZE w/The Original DIY Lineout Cable and AT Button H-Phones Fitted To AT WM5 Headband:All Custom Built
Newbie
Posts: 4
Registered: ‎12-15-2008

Re: DIY Line Out Cable - Works!

Thanks, and thank YOU for getting this thread started!  The Fuze is a great little player, and I'm really surprised at how much technical support SanDisk provides for people like us.