Audacity Forum

Just for general background information, here is quite a good (and not too technical) article that puts the case for and against high sample rates: http://www.soundonsound.com/sos/apr14/a ... 414-02.htm

The case for sample format is much more clear. High resolution formats such as 32-bit float are best for processing audio as it avoids rounding errors. The format that is actually captured is limited by the audio device and sound system. The highest bit-depth that sound cards can capture (to date) is 22 bits, (with two lsb padding or noise). When "recording at 32-bit", the data is padded from the actual number of bits delivered by the sound system (usually 16 or 24 bit) to 32-bit. Note that Audacity uses "32-bit float" rather than "32-bit integer".

Ok I uninstalled and reinstalled and hit record and discovered I did have to go into preferences to set my soundcard up correctly (or audacity to use it properly)
Hit record got a recording with the same problem in default settings. I tried changing the buffer settings in various ways and all the changes made it worse.
So hints about buffer settings may be in order. Or more ideas.
Thanks
BTW I remember in the really old days at the start of linux versions of Audacity that getting it to work was difficult. I'm sorry that I'm having such trouble with it.
Jay

frybyte wrote:Ok I uninstalled and reinstalled and hit record and discovered I did have to go into preferences to set my soundcard up correctly (or audacity to use it properly)
Hit record got a recording with the same problem in default settings.

So was this 44100 Hz, 32-bit float?

And MME host in Device Toolbar?

And did you enable the "Reset Preferences" box when you reinstalled Audacity? That is always a very good idea.

Could you attach an audio sample of the jittery recording so we can see and hear it? See http://forum.audacityteam.org/viewtopic ... 49&t=72887.


Gale

So Gale no, I didn't think a reinstall would have the settings I had given a previous install, but now I will go an wipe out Audacity and start over. I do not know where this default reset is (just briefly looked didn't see it.) and the MME thing what????
I see MME in a box and so I guess the answer to that is yes.
So let me try one more time to get to the defaults of 44/32 or 16 or whatever IF I can find that reset thing and I'll make another recording because I see that the reinstall did not return the product to it's defaults.
Thanks for whatever patience you have been using.
Jay

I wiped all traces of Audacity from the computer came back to the site downloaded 2.0.2 and other than changing recording to line input did nothing else so the recording WHICH WAS FINE was at 44/16

NOw the question(s) remain how to get the high sample rate to work, and if I need to change the buffer please make a suggestion(s).
Also I didn't try to do anything else such as bit depth change and if that should be tried first let me know.

Thanks
Jay

frybyte wrote:I wiped all traces of Audacity from the computer came back to the site downloaded 2.0.2

You would be much better to use 2.1.1 which has the latest bug fixes: http://audacityteam.org/download/windows.

frybyte wrote:other than changing recording to line input did nothing else so the recording WHICH WAS FINE was at 44/16

Please don't use abbreviations . Please write things out long hand so we know what the settings are and where you make them.

Is the project rate bottom left 44100 Hz?

Where is the "16"? Do you mean you exported as 16-bit WAV?

frybyte wrote:NOw the question(s) remain how to get the high sample rate to work

There is no guarantee it will "work". We don't even know what the exact problem is - we have not heard a sample of it.

If your Juli sound card can adjust buffer settings, yes it may be those settings are set very low in the expectation that you have a recording application that uses ASIO. Unfortunately Audacity as shipped does not support ASIO.

We don't know the exact model number of this Juli card, so we can't tell you if it can change buffer settings. Does it have a control panel you can look in?

The problem may be nothing to do with buffer - it could be mismatched sample rates. If you are using MME host in Audacity and want to use 96000 Hz project rate in Audacity then I strongly suggest you set Juli to 96000 Hz (if it has such settings in a control panel ) and set Windows Default Format for Juli to 96000 Hz.

To set Juli Default Format to 96000 Hz, right-click over the speaker icon by the system clock, then choose "Recording Devices". Right-click over the Juli then choose "Properties". Then click the "Advanced" tab and adjust Default Format. OK and OK and restart Audacity.

If that does not work then you can try the other hosts in Device Toolbar (Windows DirectSound or Windows WASAPI). If you choose either of those hosts, I suggest you enable both "Exclusive Mode" boxes in Windows (underneath the Default Format section). Then the Default Format will be ignored providing you choose DirectSound or WASAPI.

Have a read of these links:
http://wiki.audacityteam.org/wiki/Mixer ... es#vistacp
http://wiki.audacityteam.org/wiki/Windo ... mple_rates
http://wiki.audacityteam.org/wiki/Manag ... nd_Drivers .


Gale

Hi-
I will try to remember to write out all the zeros from now on.
There has never been a problem with recording 96000 at 32float in Audition 3.1 with my soundcard. None with buffering etc. So setting that should not be necessary as it already works. As far as I know there aren't versions of [email protected] and looking it up that seems to be so. I haven't run into problems using Auditions 32 float setting the card will go 192000 24bit.

As for downloading 2.1x all I did was go to the website and 2.0.2 was what was offered at that moment. I don't know what that is about, just reporting.

As for setting sample rates that has never been done and I don't think it can be done in the card (I've had this card through 3 different machines, with various sample rates and recording and playback has always just worked again with ancient cooleditpro through to Audition 3.0 and I have tried Ableton and older programs even Protools lite and never had to tweak the soundcard).

For where we/I am now....I believe I have done what you asked (to the point I could) I downloaded the program started over and made a recording without changing anything except input. However the program comes is what produced a recording with no problems.

What I was asking and ask again is "what should I try next since the sample rate in default worked?" My goal is to get to a place where I am recording at 96000 and 24 or 32float bit depth.

Thanks

frybyte wrote:I will try to remember to write out all the zeros from now on.

Just writing "kHz" would be fine
The important thing is clarity - you'd be surprised at the amount of confusion that crops up on the forum due to "insignificant details" (such as the difference between "kbps" and "kHz"). Clarity is good, and it helps people that read this in the future.

frybyte wrote:What I was asking and ask again is "what should I try next since the sample rate in default worked?" My goal is to get to a place where I am recording at 96000 and 24 or 32float bit depth.

So to recap the current position:
Your ESI [email protected] sound card works fine with Audacity 2.1.1 with the default 44.1 kHz sample rate, 32-bit float (default) settings in Audacity, but the recording is choppy if you change the default sample rate to 96kHz? Is that correct?

If that is the case, the next thing that I would try is, with "Quality" set to 96000 Hz 32-bit float, try increasing the "Audio to buffer" (in "Edit > Preferences > Recording) to say "200" and see if that makes any improvement (or makes it worse).

Gale-
This is 'nuts' (translation don't understand)
1] because I wrote that I had just gone to the website to download what was offered (v2.0.2) and then you asked to confirm 2.1.1 so I went back and downloaded that to be able correctly answer your question. I still don't know why the first time 2.1x wasn't offered but so be it.

2] I, incorrectly, assumed that since 44.1Khz worked fine in v2.0.2 that it would work in 2.1.1 so I didn't try that at first, but I couldn't and still can't get Audacity to record any signal at all in version 2.1.1. I changed the settings back to 44.1Khz tried MME and the other two options, changed line to stereo mix to mic inputs in the 'box and no signal showed. I tested with Audition and the signal is coming into the computer.

So I'm stuck again.
And I have a student who just arrived so have to sign off.

UPdate- I have a sample for you v2.1.1 MME 44100 32bit had to change the input in the software a couple more times and finally got signal but as you will hear yikes?!