[Maximiliano Campo]

You need an OTG cable. The standard one won't work. Here's the one that works great for me:
ESR USB-C to Lightning Cable, (20 cm, MFi-Certified), PD Fast Charging Cable for iPhone 13/13 mini/13 Pro/13 Pro Max/12/12 mini/12 Pro/12 Pro Max/SE 2022/11/XR/XS Max/XS/X/8, Braided Nylon, Black https://a.co/d/19rhjgT

With this, you don't need to use the camera adapter.

Thank you so much

 

[GM23]

Hi,
Is it possible to use the android app for eq etc while in usb mode? Every time I open it asks me to connect bluetooth. When I cancel the bluetooth search everything is greyed out.

 

[bassct]

Once you connect to it and modify settings they are saved on the Qudelix. Turning off the APP does not reset settings back to stock. So just set everything the way you want and forget it.

 

[divineatma]

Hi, does anyone here use the Qudelix to power a 64 Audio U12t. If yes can you share at what volume levels you use the combo and what could be considered safe to prevent damage to hearing?

 

[3fifty]

Hi, does anyone here use the Qudelix to power a 64 Audio U12t. If yes can you share at what volume levels you use the combo and what could be considered safe to prevent damage to hearing?

I quickly googled your model, and found a sensitivity of 108dB/mW, and impedance of ~12Ω. If that's right, according to my crude headphone volume spreadsheet:

Those 'permissable exposure times' are from the (stricter than OSHA) NIOSH occupational exposure to noise guidelines. OSHA permits 95dB for 8 hours IIRC, but I already have tinnitus, so I play it safe with the more conservative recommendation.

I have no idea how those numbers relate to transient spikes, mind. I have a feeling those dB figures are only accurate when playing a 1kHz sine wave. I also don't know how it is affected by EQ ie. If I allow a -8dB for EQ headroom, but then boost everything below 105Hz by 8dB....am I back to those numbers?

I spent a while trying to figure this out, to protect my ears while also getting the most out of my Aryas, but it got a bit complicated and I kinda gave up.

 

[divineatma]

I quickly googled your model, and found a sensitivity of 108dB/mW, and impedance of ~12Ω. If that's right, according to my crude headphone volume spreadsheet:

Those 'permissable exposure times' are from the (stricter than OSHA) NIOSH occupational exposure to noise guidelines. OSHA permits 95dB for 8 hours IIRC, but I already have tinnitus, so I play it safe with the more conservative recommendation.

I have no idea how those numbers relate to transient spikes, mind. I have a feeling those dB figures are only accurate when playing a 1kHz sine wave. I also don't know how it is affected by EQ ie. If I allow a -8dB for EQ headroom, but then boost everything below 105Hz by 8dB....am I back to those numbers?

I spent a while trying to figure this out, to protect my ears while also getting the most out of my Aryas, but it got a bit complicated and I kinda gave up.

Thanks a lot for the info. I was comparing those numbers to what I see in the google chrome extension that I use to control the Qudelix when using it as a USB DAC. With source volume maxed out it says 63mV on the balanced output. That means I can only listen for around 8 mins at a time
Am I interpreting it right?

 

[3fifty]

Thanks a lot for the info. I was comparing those numbers to what I see in the google chrome extension that I use to control the Qudelix when using it as a USB DAC. With source volume maxed out it says 63mV on the balanced output. That means I can only listen for around 8 mins at a time
Am I interpreting it right?

Yes, albeit with all the caveats I mentioned about me not really knowing what I'm talking about . I don't know if the calculated output is an absolute maximum and normal music won't quite hit that. I don't know if that output is calculated exactly at the diaphragm, meaning at the ear drum it's less... I tried to contact my local hearing expert about it all, and getting my headphone volume measured with proper equipment, but she didn't have anything that covers the frequency range. She only really deals with measuring hearing aids.

The main takeaway I got from running all the numbers is that 'safe' listening levels are much quieter than I'd thought, unfortunately. And that damage occurs regardless of frequency, so be careful with heavy bass, because it's easier to put up with vs higher pitches, and since ears are less sensitive to it - volume is harder to judge, but it's just as damaging, even if the perceived bass level is lower than mids/highs.

 

[divineatma]

Yes, albeit with all the caveats I mentioned about me not really knowing what I'm talking about . I don't know if the calculated output is an absolute maximum and normal music won't quite hit that. I don't know if that output is calculated exactly at the diaphragm, meaning at the ear drum it's less... I tried to contact my local hearing expert about it all, and getting my headphone volume measured with proper equipment, but she didn't have anything that covers the frequency range. She only really deals with measuring hearing aids.

The main takeaway I got from running all the numbers is that 'safe' listening levels are much quieter than I'd thought, unfortunately. And that damage occurs regardless of frequency, so be careful with heavy bass, because it's easier to put up with vs higher pitches, and since ears are less sensitive to it - volume is harder to judge, but it's just as damaging, even if the perceived bass level is lower than mids/highs.

Ah ok...thx for the info. Was not aware that bass has more of an impact on damage at high levels.

 

[michusxx]

Ah ok...thx for the info. Was not aware that bass has more of an impact on damage at high levels.

Hi.
I'd recomend to view very interesting presentation from Amirm @audiosciencereview regarding this "loudness vs. actually required power" topic. I hope it will make things more clear

 

[3fifty]

Hi.
I'd recomend to view very interesting presentation from Amirm @audiosciencereview regarding this "loudness vs. actually required power" topic. I hope it will make things more clear

Hmmm. I was hoping I'd find some answers there, but I've ended up wanting to be one of those commenters that questions him

He seems to draw the conclusion that because OSHA isn't interested in low frequencies, therefore they probably don't damage hearing. This is counter to what a career audiologist and hearing rehabilitation specialist told me: hearing damage happens as a function of volume, regardless of frequency - and that 120dB of 20Hz is as damaging as 120dB of 2kHz or 12kHz... It seems more likely that OSHA is the absolute bare minimum/almost not enough to protect from a later life full of tinnitus and difficulty hearing speech in busy areas.

And he then goes on to show that there is far more energy in the bass - and somehow draws the conclusion that 'since the government doesn't worry about bass, you're allowed to have 40dB more in bass" (around the 19min mark). How is he drawing that conclusion?

He gives a handful of examples of how loud certain live music events and somehow that means you shouldn't worry about over-exposure from headphones. I'm thinking 'Dude, I wear -25dB earplugs to live shows...' Also, it's not about 'going deaf', but causing permanent damage through over-exposure, and leaving myself with shot ears in 20 years time, or exacerbating my already irritating tinnitus.

I don't have an account to leave youtube comments, so I'll spare him the questions

 

[monsieurfromag3]

Hmmm. I was hoping I'd find some answers there, but I've ended up wanting to be one of those commenters that questions him

He seems to draw the conclusion that because OSHA isn't interested in low frequencies, therefore they probably don't damage hearing. This is counter to what a career audiologist and hearing rehabilitation specialist told me: hearing damage happens as a function of volume, regardless of frequency - and that 120dB of 20Hz is as damaging as 120dB of 2kHz or 12kHz... It seems more likely that OSHA is the absolute bare minimum/almost not enough to protect from a later life full of tinnitus and difficulty hearing speech in busy areas.

And he then goes on to show that there is far more energy in the bass - and somehow draws the conclusion that 'since the government doesn't worry about bass, you're allowed to have 40dB more in bass" (around the 19min mark). How is he drawing that conclusion?

He gives a handful of examples of how loud certain live music events and somehow that means you shouldn't worry about over-exposure from headphones. I'm thinking 'Dude, I wear -25dB earplugs to live shows...' Also, it's not about 'going deaf', but causing permanent damage through over-exposure, and leaving myself with shot ears in 20 years time, or exacerbating my already irritating tinnitus.

I don't have an account to leave youtube comments, so I'll spare him the questions

I’m glad you didn’t spare us though, it’s refreshing to see a mind functioning well. In my experience, when someone publishes a brain fart that includes so many fundamental reasoning flaws, on a self-described scientific platform no less, it’s useless to even request a reply. Your questions are already more advanced than any answer that person may provide…

 

[redryder]

Hi, new owner here, hope you guys can help me.

Why is it that every time I turn the Qudelix on, the default is that the EQ/DSP is turned off? How do I make it turned on by default?

 

[rlw6534]

Hi, new owner here, hope you guys can help me.

Why is it that every time I turn the Qudelix on, the default is that the EQ/DSP is turned off? How do I make it turned on by default?

Or maybe have a way to turn PEQ on and off using the buttons rather than the app.

 

[manukmanohar]

Hi, new owner here, hope you guys can help me.

Why is it that every time I turn the Qudelix on, the default is that the EQ/DSP is turned off? How do I make it turned on by default?

I'm facing the same problem. Everytime I turn the qudelix on, the PEQ is off, due to which the frequency targets I have set don't apply.
I tried factory resetting as well as resetting settings in the app, but no luck.

Do let me know if anyone has figured out how to solve the problem.

 

[divineatma]

Could be an issue with your units. The two times that I just tried power cycling with a PEQ ON the device did turn on with the PEQ applied. Have you guys saved the custom preset with a name on your device?