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This Schiit is Bananas! $99 Schiit Magni Amp and $99 Modi DAC - Page 57

post #841 of 1366
Quote:
Originally Posted by USAudio View Post


Yep, Schiit should really do something to address this.  In the meantime, just ensure you are feeding the Modi a 24-bit stream and adjust the volume down digitally on your computer.  Then you have more room to adjust the volume on the Magni to a more suitable place.

I've tried that, but it noticeably effects SQ. The more you lower the digital volume, the more dynamics are crushed. At least with iTunes on OSX.

post #842 of 1366
Are you sure you're sending a 24bit signal?

When a 16bit signal is converted up to 24 bit, each individual command is of the form ################00000000. Where #'s represent the original 16 binary digits of the song file, and the 0's are tacked onto the end to bring the song "up" to the top of the 24 bit converters volume level (or else 16 bit streams unconverted would be quieter than the 24bit native files). When you turn the volume down digitally, it changes the last digits first, so effectively you're truncating the 0's, which weren't part of the origionall file, and had a value of "null" anyway.

This should be true down to the single digit percentages of the digital volume before you run out of "blank" bits to play with, meaning there should be 0 change to the dynamic range of the song, unless something is wrong (like for instance, if your computer isn't set to always send files as 24bit audio files, in which case, you'd be altering digits from the original 16 bit stream and thus altering the properties of the sound)
post #843 of 1366
Quote:
Originally Posted by Maverickmonk View Post

Are you sure you're sending a 24bit signal?
When a 16bit signal is converted up to 24 bit, each individual command is of the form ################00000000. Where #'s represent the original 16 binary digits of the song file, and the 0's are tacked onto the end to bring the song "up" to the top of the 24 bit converters volume level (or else 16 bit streams unconverted would be quieter than the 24bit native files). When you turn the volume down digitally, it changes the last digits first, so effectively you're truncating the 0's, which weren't part of the origionall file, and had a value of "null" anyway.
This should be true down to the single digit percentages of the digital volume before you run out of "blank" bits to play with, meaning there should be 0 change to the dynamic range of the song, unless something is wrong (like for instance, if your computer isn't set to always send files as 24bit audio files, in which case, you'd be altering digits from the original 16 bit stream and thus altering the properties of the sound)

Yep - OSX defaults to 24 bit which I verified in the Audio MIDI Setup.

 

I came across a helpful paper at Wadia's website that shows how their digital volume control into a 24 bit dac doesn't result in any lost resolution when attenuating a sample:

 

http://www.wadia.com/technology/technicalpapers/Digital_Volume_Control_2.pdf

 

Makes sense, but how things work elsewhere would perhaps depend on the digital volume implementation?


Edited by slantedview - 1/9/13 at 12:14pm
post #844 of 1366
Quote:
Originally Posted by slantedview View Post

I've tried that, but it noticeably effects SQ. The more you lower the digital volume, the more dynamics are crushed. At least with iTunes on OSX.
Hmmm, interesting. That hasn't been my experience on Windows.
How much are you attenuating the volume digitally?
post #845 of 1366

Try Audirvana.. they say that with their SW, there is no degradation is sound and it integrates well with iTunes. I usually drop the volume by 11db and that makes my Magni & even the Lyr useful with cans like the v-moda M100.

 

Quote:

Originally Posted by slantedview View Post

I've tried that, but it noticeably effects SQ. The more you lower the digital volume, the more dynamics are crushed. At least with iTunes on OSX.

post #846 of 1366
Quote:
Originally Posted by USAudio View Post

Hmmm, interesting. That hasn't been my experience on Windows.
How much are you attenuating the volume digitally?

 

30%ish.

 

 

Quote:
Originally Posted by MickeyVee View Post
 

I use and love Audirvarna (free), but when using a USB dac (Modi) it doesn't allow you to adjust volume.


Edited by slantedview - 1/9/13 at 1:38pm
post #847 of 1366
Audirvana + let's you adjust the volume to the dac.
post #848 of 1366
Quote:
Originally Posted by peter123 View Post

Review on Headfonia:

http://www.headfonia.com/schitty-magni-and-modi/2/
I just read this headfonia review and he stated that the m&m stack sounds atrocious with the monoprice cables... Which is what I ordered. Is it true? Does it make that huge of a difference? I thought cables make a very minor gain for the exponential prices?
post #849 of 1366
Quote:
Originally Posted by thinh4u2 View Post



I just read this headfonia review and he stated that the m&m stack sounds atrocious with the monoprice cables... Which is what I ordered. Is it true? Does it make that huge of a difference? I thought cables make a very minor gain for the exponential prices?

Answers in order: No, No, Yes. 

post #850 of 1366
Quote:
Originally Posted by imackler View Post

Answers in order: No, No, Yes. 
Lol thanks, I was getting ready to delete this my post. My greyhound got delayed and so I am flipping through the posts very slowly via my tiny phone and finally just saw some of the replies. I just panicked when I read it on headfonia. Thanks for the reassurance :-)
post #851 of 1366
Quote:
Originally Posted by officerdoofy View Post

Anyone using these with sensitive IEMs? I'm considering the stack to drive my JH-16s in the office, but I'm worried about there being background hiss.

 

Using with JH16 here and dead silent which was/is impressive. Only problem (which many have confirmed) is the volume at anything before 8/8:30 position -- you get channel imbalance, which unfortunately for the low ohm headphones/iems like our JH16s, anything above 8:30 gets quite loud, so have to resort to digital/computer volume adjustment instead. I set mine at 9 to get past the channel imbalance comfortably, then use software (Audirvana for Mac) for volume adjustment.

post #852 of 1366
Quote:
Originally Posted by hp300plus View Post

 

Using with JH16 here and dead silent which was/is impressive. Only problem (which many have confirmed) is the volume at anything before 8/8:30 position -- you get channel imbalance, which unfortunately for the low ohm headphones/iems like our JH16s, anything above 8:30 gets quite loud, so have to resort to digital/computer volume adjustment instead. I set mine at 9 to get past the channel imbalance comfortably, then use software (Audirvana for Mac) for volume adjustment.

Same issue I hit. Are you running Audirvarna Plus or Audirvarna free without a USB dac?

post #853 of 1366
Quote:
Originally Posted by slantedview View Post

30%ish.


I use and love Audirvarna (free), but when using a USB dac (Modi) it doesn't allow you to adjust volume.

I'd assume that's in the realm of losing bit data. I would move that up to like 70%.
post #854 of 1366
Quote:
Originally Posted by Mad Lust Envy View Post

I'd assume that's in the realm of losing bit data. I would move that up to like 70%.

Actually, since there's 8 free bits to play with, and each bit multiplies the volume by 2, if i'm correct that is, you should be able to cut the volume to one over 2^8, or 1/256th the max level. I'd like if someone with more computer science knowledge than me could check my work though, hahah
post #855 of 1366
Quote:
Originally Posted by Maverickmonk View Post


Actually, since there's 8 free bits to play with, and each bit multiplies the volume by 2, if i'm correct that is, you should be able to cut the volume to one over 2^8, or 1/256th the max level. I'd like if someone with more computer science knowledge than me could check my work though, hahah

 

Assuming 16 bit data into a 24 bit DAC you are correct.

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