interesting.  going with noise -> dac directly,

when my headphones aren't plugged in, it's pretty loud even at the lowest volume setting

when they're plugged in, it's REALLY loud at all volume settings.

like, it sounds exactly the same loudness whatever the volume, so long as it's not 0 (my headphones are sitting beside the laptop - they're going nowhere near my head)

On Tue, Aug 23, 2011 at 10:05 PM, Jonathan Wilkes <jancsika@yahoo.com> wrote:

Hm... I'm not sure I understand the danger.

Isn't this:

[noise~]

|

[*~ 999999]

|

[dac~]

an implicit version of:

[noise~]

|

[*~ 999999]

|

[clip~ -1 1]

|

[dac~]

?

Doesn't the signal generated by either of these create the greatest perceived volume-- something approaching a bunch of square waves at maximum amplitude at every frequency?  If so you couldn't one just make sure that this output doesn't hurt one's ears with the headphones on?

-Jonathan

To: Stephen Lavelle <analytic@gmail.com>
Cc: pd-list@iem.at
Sent: Tuesday, August 23, 2011 3:46 PM
Subject: Re: [PD] making puredata headphone-safe

That's the danger of low level manipulation :D 

[adc~]

|

[* 1000]

|

[dac~]

not the best idea :)

Put the volume low always, and be extremely careful. 

OR: compressor? peak limiter? (after the headphones...) Because if you are suggesting "to be code careful" that might mess up all the fun.

Best,

Pedro 

On Tue, Aug 23, 2011 at 8:29 PM, Stephen Lavelle <analytic@gmail.com> wrote:

I've managed to hurt my ears twice over the past two days when using PD w/ headphones.  Even at lowest system volumes, it seems that Terrible Things can happen.  Are there any precautions that I can take to make it feel less like I'm taking my life into my hands when I have to use headphones?

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--
Pedro Lopes (HCI Researcher / MSc)
contact: pedro.lopes@ist.utl.pt
website: http://web.ist.utl.pt/Pedro.Lopes / http://pedrolopesresearch.wordpress.com/ | http://twitter.com/plopesresearch

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From: Pedro Lopes <pedro.lopes@ist.utl.pt>

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