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Chord Mojo(1) DAC-amp ☆★►FAQ in 3rd post!◄★☆

Aug 3, 2016 at 6:53 AM Post #20,776 of 42,916
Posted by SearchOfSub /img/forum/go_quote.gifQuote:
jaeyoon said:
Also original audio store I bought from Audio High has a policy that won't take refunds if the product is opened....
Click to expand...

What kind of company takes no returns now this day in age. I understand restocking fee but no return at all? I know i won't be buying from that place...
Click to expand...

Honestly, I'm not a big fan of "returned Items". I ordered a "new" Dragon Fly from Amazon and I got a non-sealed package and the DF was scuffed. Why should I be asked to pay full price for a "tested" product?
rolleyes.gif

 
It's of course another thing entirely if the store that accepts returns also sells them as such - "open-box" deals, etc.
In that case, not a problem. There are plenty of people out there, that unlike myself,  are not affected by OCD...
tongue.gif

 
27118879585_81697b5db0_c.jpg

 
27050514431_ee6798c371_c.jpg

 
 
Aug 3, 2016 at 7:10 AM Post #20,778 of 42,916
redstar said:
Get both, to use in a stack? Will that sound significantly better when using both?
Click to expand...
get both to compare, to stack and/or use seperately. Both are great.
 
Aug 3, 2016 at 7:16 AM Post #20,779 of 42,916
traveller said:
  Posted by SearchOfSub /img/forum/go_quote.gifQuote:
Honestly, I'm not a big fan of "returned Items". I ordered a "new" Dragon Fly from Amazon and I got a non-sealed package and the DF was scuffed. Why should I be asked to pay full price for a "tested" product?
rolleyes.gif

 
It's of course another thing entirely if the store that accepts returns also sells them as such - "open-box" deals, etc.
In that case, not a problem. There are plenty of people out there, that unlike myself,  are not affected by OCD...
tongue.gif

 
27118879585_81697b5db0_c.jpg

 
27050514431_ee6798c371_c.jpg

 
Click to expand...

 
That doesn't look too good.
I avoid buying open-box items, but i am happy with ex-demo items. I bought my Mojo from a dealer as ex-demo, and I was pleasantly surprised by the condition. I struggled to see any signs of wear or use, and eventually persuaded myself that maybe (only maybe!) there was some 'polishing' of the surface of the balls, which I happily accept as part of the Mojos previous use for demo purposes.
Based on this experience, i would happily buy more ex-demo gear from that dealer.
 
Aug 3, 2016 at 10:31 AM Post #20,781 of 42,916
Here is my latest (and most likely final) all-in-one portable transport enclosure for the Mojo: the "MojoPi".

 


Size comparison with iPhone 6s
 
It consists of:
 
Raspberry Pi 3 Mainboard with built-in WiFi, but with the LAN, USB, HDMI, and audio ports removed.
Waveshare Spotpear 3.5" Resistive Touch Screen or equivalent (see http://www.ebay.com/itm/291722114342?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT)
Adafruit 2500 mAh Lithium battery to power the RPi3 (at least 3hrs play time)
Adafruit Powerboost 1000c (to convert the 2500 mAh 3.7 volt battery to 5 volts and to charge the battery)
Anker USB Dual SD/MicroSD reader removed from shell
SD to Micro SD FPC Extender
2 PNY 512GB SD cards
200GB Sandisk MicroSD card (OS + Music) inserted in RPi3 microSD card slot
Adafruit Switch
Chord Mojo
3D Print Enclosure
 
Its dimensions are 125mm long x 98.2mm wide x 26mm high and it weighs 358g. The Mojo is connected to the RPi3 via a DIY microUSB cable soldered directly to the RPi3. The dual USB SD/MicroSD card reader is also soldered directly to the RPi3. The MojoPi can hold up to 1.2 TB of music on 2 full-size SD cards and a 200 GB microSD card. The interface is Rune Audio (based on Arch Linux). I can access Rune Audio through the screen or remotely via WiFi on a web browser using the IP address of the MojoPi.
 
The touchscreen is resistive, not capacitive, and so requires a fingernail or a stylus; it is not very easy to scroll. There doesn't seem to be a readily-available 3.5" or smaller capacitive touch screen that works with both the RPi3 and Rune Audio.
 
I need to insert a USB 2.0 Micro-B Male to Micro-AB Female Adapter into a slot on the side to charge the Mojo.
 
I think this is as small an enclosure as possible that contains both a 3.5" screen and a Mojo without removing the Mojo board from its case and connecting the Mojo directly to the RPi instead of using the Mojo's microUSB port. That would potentially narrow the unit by about 10 mm. A smaller board (One example is the Odroid C0), containing just a SOC for the operating system, an on-board battery booster/charger, and USB connections to SD cards, could provide for either more storage or a larger battery, but wouldn't change the overall size very much, since the Mojo and the screen pretty much determine the minimum dimensions of the enclosure. The plastic enclosure is fairly sturdy, but a harder plastic or metal enclosure would clearly be preferable.
 
I haven't done any kind of real comparison between the MojoPi and a more traditional phone/Mojo or PC/Mojo setup, but to me it sounds great. Despite the slapdash internal wiring, I haven't had any noticeable clicks or interference. I've played 44.1/16 up to 192/24 PCM without any problem. DSD64 seems to work well enough, although I have had the occasional drop-out.
 
Is it just me or does anyone else think it would be cool if Chord came out with something like this?
 
Cheers,
Rod
 
Aug 3, 2016 at 11:19 AM Post #20,784 of 42,916
staxton said:
  Here is my latest (and most likely final) all-in-one portable transport enclosure for the Mojo: the "MojoPi".

 


Size comparison with iPhone 6s
 
It consists of:
 
Raspberry Pi 3 Mainboard with built-in WiFi, but with the LAN, USB, HDMI, and audio ports removed.
Waveshare Spotpear 3.5" Resistive Touch Screen or equivalent (see http://www.ebay.com/itm/291722114342?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT)
Adafruit 2500 mAh Lithium battery to power the RPi3 (at least 3hrs play time)
Adafruit Powerboost 1000c (to convert the 2500 mAh 3.7 volt battery to 5 volts and to charge the battery)
Anker USB Dual SD/MicroSD reader removed from shell
SD to Micro SD FPC Extender
2 PNY 512GB SD cards
200GB Sandisk MicroSD card (OS + Music) inserted in RPi3 microSD card slot
Adafruit Switch
Chord Mojo
3D Print Enclosure
 
Its dimensions are 125mm long x 98.2mm wide x 26mm high and it weighs 358g. The Mojo is connected to the RPi3 via a DIY microUSB cable soldered directly to the RPi3. The dual USB SD/MicroSD card reader is also soldered directly to the RPi3. The MojoPi can hold up to 1.2 TB of music on 2 full-size SD cards and a 200 GB microSD card. The interface is Rune Audio (based on Arch Linux). I can access Rune Audio through the screen or remotely via WiFi on a web browser using the IP address of the MojoPi.
 
The touchscreen is resistive, not capacitive, and so requires a fingernail or a stylus; it is not very easy to scroll. There doesn't seem to be a readily-available 3.5" or smaller capacitive touch screen that works with both the RPi3 and Rune Audio.
 
I need to insert a USB 2.0 Micro-B Male to Micro-AB Female Adapter into a slot on the side to charge the Mojo.
 
I think this is as small an enclosure as possible that contains both a 3.5" screen and a Mojo without removing the Mojo board from its case and connecting the Mojo directly to the RPi instead of using the Mojo's microUSB port. That would potentially narrow the unit by about 10 mm. A smaller board (One example is the Odroid C0), containing just a SOC for the operating system, an on-board battery booster/charger, and USB connections to SD cards, could provide for either more storage or a larger battery, but wouldn't change the overall size very much, since the Mojo and the screen pretty much determine the minimum dimensions of the enclosure. The plastic enclosure is fairly sturdy, but a harder plastic or metal enclosure would clearly be preferable.
 
I haven't done any kind of real comparison between the MojoPi and a more traditional phone/Mojo or PC/Mojo setup, but to me it sounds great. Despite the slapdash internal wiring, I haven't had any noticeable clicks or interference. I've played 44.1/16 up to 192/24 PCM without any problem. DSD64 seems to work well enough, although I have had the occasional drop-out.
 
Is it just me or does anyone else think it would be cool if Chord came out with something like this?
 
Cheers,
Rod
Click to expand...

 
Very good, and possibly you have already done 90% of the development work, that could be relatively easily extended to realise an idea I was having this morning.
 
Take as inspiration a network player such as this for a start point http://www.cocktailaudio.com/overview.html
 
I was thinking, that if one had some old no longer used hifi equipment, built into a case like this:
  • remove the internal circuitry etc
  • create a new front panel (3d printed?) which featured a space for a touchscreen, plus a dock which one could use to connect their Mojo
  • use raspberry pi (or similar) to control everything internally
  • add one or more SSD to store ones music library
  • work our how to connect it all together, and write the software
 
And then you have a low cost music player, with the DAC functionality of a Mojo, that would musically outperform music players being sold for thousands of pounds/dollars/euros.
 
As I say, you have done 90% of the development work - a domestic network player just uses a different form factor, plus SSD. 
 
Again, well done.   
regular_smile .gif
 
 
Aug 3, 2016 at 11:33 AM Post #20,785 of 42,916
Hi, I tried some dap: iBasso DX80 analytical sound and tiring, onkyo dp x1 also a little tiring and the sound was not well filled, ak jr not detailed enough.
I grado sr 225E headphones you think a samsung s3 + mojo will have an engaging and not annoying sound with thrasch metal music?
 
Aug 3, 2016 at 12:30 PM Post #20,786 of 42,916
cirodts said:
  Hi, I tried some dap: iBasso DX80 analytical sound and tiring, onkyo dp x1 also a little tiring and the sound was not well filled, ak jr not detailed enough.
I grado sr 225E headphones you think a samsung s3 + mojo will have an engaging and not annoying sound with thrasch metal music?
Click to expand...

 
I have the 225e and the Mojo. I love it. However I do feel it needs better headphones.
 
Aug 3, 2016 at 12:33 PM Post #20,787 of 42,916
miketlse said:
   
Very good, and possibly you have already done 90% of the development work, that could be relatively easily extended to realise an idea I was having this morning.
 
Take as inspiration a network player such as this for a start point http://www.cocktailaudio.com/overview.html
 
I was thinking, that if one had some old no longer used hifi equipment, built into a case like this:
  • remove the internal circuitry etc
  • create a new front panel (3d printed?) which featured a space for a touchscreen, plus a dock which one could use to connect their Mojo
  • use raspberry pi (or similar) to control everything internally
  • add one or more SSD to store ones music library
  • work our how to connect it all together, and write the software
 
And then you have a low cost music player, with the DAC functionality of a Mojo, that would musically outperform music players being sold for thousands of pounds/dollars/euros.
 
As I say, you have done 90% of the development work - a domestic network player just uses a different form factor, plus SSD. 
 
Again, well done.   
regular_smile%20.gif
 
Click to expand...

Thanks very much! 
 
You might be interested in this post: http://www.head-fi.org/t/810520/portable-all-in-one-dap-with-chord-mojo
 
Aug 3, 2016 at 2:14 PM Post #20,790 of 42,916
I thought I'd just try a Jitterbug in my chain.I picked up the bug today and since I had the fitting adapterS on hand I tried it on my phone first. It was a pleasant surprise. It's too early to give any real impressions, but I like what I hear :)
For those of you who think that this is not usable on the go.... You are absolutely right... See for yourself



If I recall correctly Rob recently said, that the jitterbug is more effective when used on a source powered from the grid... So I will definitely try the jitterbug on my Odroid and hope the improvement are even bigger in that scenario ;)

Cheers
 
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