Chord Mojo(1) DAC-amp ☆★►FAQ in 3rd post!◄★☆ | Page 829 | Headphone Reviews and Discussion - Head-Fi.org

sodesuka · Mar 5, 2016 at 5:11 AM

x relic x said:
FYI, Lithium batteries are very stressed when kept near a full charge for extended periods of time, ie. weeks on end 24/7. I know Chord has said that the battery keeps a net charge when plugged in, or stops at 8.4V and tops up below 8.2V, but I've had too many lithium batteries die (they only keep a charge for a couple hours) by leaving them plugged in all the time for months. I'm not exactly sure if this applies to the Mojo's battery specifically given that its apparently a new battery tech, but that could be more for the thermals.

Also, to extend the serviceable life of the battery (approximately double) you should only drain to 20% and charge to 80%. You can read about it here:

http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries

The good thing is you can always run it unplugged and when in a low battery situation you can plug it in to charge when using thanks to the separate charging USB port. This would avoid the excessive 24/7 full charge stress. These are recommended best uses for Lithium batteries, however use the Mojo as you see fit.

Only problem is the obstructed battery indicator for desktop use, I inadvertently drained Mojo completely twice during long-sessions of gaming since I didn't notice the indicator running low when Mojo is put on the desk. That's about my only complain though, thing's amazing.

sheldaze · Mar 5, 2016 at 6:38 AM

dxanex said:
Gave that a shot, but still only showing red no matter what sample rate is playing. I may try and contact Chord directly.

I agree with @AudioBear in post #12411 in that I do not understand how you are sending DSD or FLAC to the external DAC (being your Chord Mojo) from your iDevice without use of a third party app, such as Onkyo HF?

x RELIC x · Mar 5, 2016 at 7:01 AM

sheldaze said:
I agree with @AudioBear
in post #12411 in that I do not understand how you are sending DSD or FLAC to the external DAC (being your Chord Mojo) from your iDevice without use of a third party app, such as Onkyo HF?

That's why I asked what app he's using. Everything Apple, Spotify and Tidal is 44.1, so for high resolution or DSD there must be another app used.

sheldaze · Mar 5, 2016 at 7:13 AM

x relic x said:
That's why I asked what app he's using. Everything Apple, Spotify and Tidal is 44.1, so for high resolution or DSD there must be another app used.

Hope he replies to one of the many responses

I've just started using my Android and iDevices, opting to use them for audio meets, so I appreciate the confusion. My iDevices by default send everything in 16-bit/44.1kHz and my Android devices send everything by default in 24-bit/192kHz (or something close to that). Then Apple desktop sends audio (by default with the Chord Mojo) in a resolution so high that it simply does not work. And in last place, Windows just does not send audio at all, by default

So much audio fun for the newcomers!

x RELIC x · Mar 5, 2016 at 7:22 AM

sheldaze said:
Hope he replies to one of the many responses

I've just started using my Android and iDevices, opting to use them for audio meets, so I appreciate the confusion. My iDevices by default send everything in 16-bit/44.1kHz and my Android devices send everything by default in 24-bit/192kHz (or something close to that). Then Apple desktop sends audio (by default with the Chord Mojo) in a resolution so high that it simply does not work. And in last place, Windows just does not send audio at all, by default

So much audio fun for the newcomers!

For Mac OSX you can go into the midi controller to adjust the sampling rate that is output. I prefer IOS's approach of not up-sampling everything, the Mojo is far more capable for sampling the files.

To be honest DSD has absolutely no audible advantage to my ears when I compare the same master to a 24/96 PCM version. Believe me, I've tested until I couldn't test any more. Rob has also made some informative posts about DSD, check them out if you want his take on DSD.

Edit: My DSD comments weren't directed at you specifically, just that it's really not worth the hassle in general (IMO) when talking about sampling rates. A quality master at CD 16/44.1 lossless will sound fantastic.

uzi2 · Mar 5, 2016 at 7:36 AM

x relic x said:
To be honest DSD has absolutely no audible advantage to my ears when I compare the same master to a 24/96 PCM version. Believe me, I've tested until I couldn't test any more. Rob has also made some informative posts about DSD, check them out if you want his take on DSD.

Most likely the original DSD was mastered in PCM before conversion anyway. DSD from recording to mastering is still pretty rare and the resulting files are way too big for portable use. If I had any, I would probably be converting them to PCM 24/96 for convenience as well as SQ.
I prefer the PCM "Jazz at the Pawnshop" to SACD.

sheldaze · Mar 5, 2016 at 7:37 AM

x relic x said:
For Mac OSX you can go into the midi controller to adjust the sampling rate that is output. I prefer IOS's approach of not up-sampling everything, the Mojo is far more capable for sampling the files.

To be honest DSD has absolutely no audible advantage to my ears when I compare the same master to a 24/96 PCM version. Believe me, I've tested until I couldn't test any more. Rob has also made some informative posts about DSD, check them out if you want his take on DSD.

Edit: My DSD comments weren't directed at you specifically, just that it's really not worth the hassle in general when talking about sampling rates. A quality master at CD 16/44.1 lossless will sound fantastic.

I know my way around all the platforms...now. But I had to learn, starting with some of the basics, like everyone else. I still get tripped up on occasion - I plugged a Grace Design m9XX into a friend's Mac laptop, only to realize after he complained it was too smooth that his Mac was upsampling to the highest resolution it thought necessary to match the DAC. I'm just saying it is daunting for the newbie.

DSD and high resolution were, in my opinion, a solution to an issue in the DAC. With many DACs today, such as the Mojo, there is much more information extracted from the original 16-bit/44.1kHz that I completely agree with you. We should not need high resolution, and now we can hear what a great abundant level of detail there is in the original CD content.

Blasyrkh · Mar 5, 2016 at 7:51 AM

sheldaze said:
We should not need high resolution, and now we can hear what a great abundant level of detail there is in the original CD content.

if you ask me, 24/192 is more than enough, and anything above that it's pretty futile.

and IMO, for most people using low-fi cans under 100$ on the go, even 16/44 is too much, considering the space taken compared to a good ripped 320 mp3

sheldaze said:
Then Apple desktop sends audio (by default with the Chord Mojo) in a resolution so high that it simply does not work.

what!?! impossible, if it doesn't work there's another reason, maybe you haven't changed the output device

GodsInHisHeaven · Mar 5, 2016 at 8:27 AM

sodesuka said:
Only problem is the obstructed battery indicator for desktop use, I inadvertently drained Mojo completely twice during long-sessions of gaming since I didn't notice the indicator running low when Mojo is put on the desk. That's about my only complain though, thing's amazing.

Gaming is one of the use cases I want to use the Mojo for. Do you happen to have it compared to the Asus STX 2 or Soundblaster ZXr?

Blasyrkh · Mar 5, 2016 at 8:34 AM

godsinhisheaven said:
Gaming is one of the use cases I want to use the Mojo for. Do you happen to have it compared to the Asus STX 2 or Soundblaster ZXr?

it depends, which comparation? sound or gaming features-wise?

GodsInHisHeaven · Mar 5, 2016 at 8:43 AM

blasyrkh said:
it depends, which comparation? sound or gaming features-wise?

I don't really use any features anymore because I feel like they are messing to much with the SQ.

So even in sound depended shooters like Rainbow Six: Siege I leave my STX 2 in Hifimode (nothing SW-wise activated). I feel like locating enemies in the room still works effortlessly.

Blasyrkh · Mar 5, 2016 at 8:56 AM

godsinhisheaven said:
I don't really use any features anymore because I feel like they are messing to much with the SQ.

So even in sound depended shooters like Rainbow Six: Siege I leave my STX 2 in Hifimode (nothing SW-wise activated). I feel like locating enemies in the room still works effortlessly.

for gaming I use:

- DAC1 + HD800 + razer surround emulation software
- Sony HD700DS
- Astro A50

sound quality is obviusly better with the first config, and even if I haven't tested Mojo with games yet, i'm sure it will work as well as the dac1.

soundwise, there's no comparison at all with soundblaster,if you plan to use it for music it will be a big step up, but i don't know if quality matters that much in FPS-like games, expecially Online.
It also depends on which HP you are using, not all the cans give good directionality...gaming is not only source quality dependant, but listening to music is just ..."different", and may require different kind of headphones

I almost play CSGO with the sony, i don't need the HD800 for that, which I use for Movie-Like games

dxanex · Mar 5, 2016 at 9:17 AM

x relic x said:
It likely means that the source is sampling anything you play to 44.1. What app are you using to play (besides Spotify and Tidal HiFi which are going to be 16/44.1 anyway)? FLAC is also 16/44.1 at CD quality but can also be high resolution files like 24/44.1 - 24/192. So, what are you using to play DSD or high resolution files?

Isn't Tidal HiFi supposed to stream at a higher sample rate than Spotify premium? I'm using Vox on my iPhone, playing files hat I can confirm are 24/96kHz and DSD but I've never seen the power light change to any color other than bright red. Maybe I'll try another hi res audio player.

Blasyrkh · Mar 5, 2016 at 9:25 AM

dxanex said:
Isn't Tidal HiFi supposed to stream at a higher sample rate than Spotify premium? I'm using Vox on my iPhone, playing files hat I can confirm are 24/96kHz and DSD but I've never seen the power light change to any color other than bright red. Maybe I'll try another hi res audio player.

there's no DSD bitstream support in those apps like VOX.
DSD audio is converted to standard PCM, it should reach 32bit @ 192khz or maybe 96khz at max, it cannot even reach the true 64bit 352/705 khz lossless convertion.
you'll never see the white light using those programs, and maybe in the settings (synchronize sample rates should be the setting you are searching for) you'll be able to convert files to an higher frequency than the standard 44.1, but hardly more than 192

using JRiver with asio (i don't know how it works with mac jriver version), you can output a bitstream DoP dsd format from SACD isos or DSF files...and you'll finally see the white light
Onkyo HF or UAPP can do it too

Francisk · Mar 5, 2016 at 9:31 AM

Does anybody know if it's okay to charge he Mojo using 2 amps load instead of 1 amp. Any possibility of damaging my Mojo by using 2 amps charging?

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