Thanks Robert. Playing with all of them will keep me out of mischief
for the rest of the evening. This also puts your earlier comments into
context.
Andrew
On 21/09/2017 8:55 PM, Robert Hänggi wrote:
Hi Andrew
I use the TTS-Suite Nyquist plug-ins.
https://www.dropbox.com/s/xzvi08mklgwsd99/tts-suite.zip?dl=1
It is a bunch of about 15 self-voicing tools (Vocal Artist: Robbie Sandberg).
They will appear in the analyze menu and all names will begin with "Report ...":
They work on the selection and thus will not work if no selection is present.
1, tts-correlation.ny
Reports the correlation between the left and right channel of a stereo track.
Same as in Vocal Reduction and Isolation --> Analyze
2. tts-end.ny
Reports the end of the selection in a suitable time format.
3. tts-freq.ny
Reports the fundamental frequency of the selection. The range is
limited to that of common instruments (e.g. guitar).
4. tts-gain.ny
The gain (slider position) of the selected tracks.
5. tts-length.ny
Reports the length of the selection in a suitable time format.
6. tts-pan.ny
Reports the position of the pan slider in percent (ie -0.1 --> -10 %)
7. tts-peak.ny
Reports the Peak for the selected tracks over the selected time range.
Essentially the same value as in "Amplify" but with reversed sign.
8. tts-peak-gain.ny
Reports the Peak for the selected tracks over the selected time range.
The track gain is taken into account.
Recommended as it reflects the true Peak after rendering or on export.
9. tts-pitch.ny
Same as tts-freq.ny but it is given as note name + cents, rather than in Hertz.
10. tts-rms.ny
Reports the RMS for the selected tracks over the selected time range.
11. tts-rms-gain.ny
Reports the RMS for the selected tracks over the selected time range.
The track gain is taken into account.
Recommended as it reflects the true RMS after rendering or on export.
12. tts-start.ny
Reports the start of the selection in a suitable time format.
13. tts-stereo-width.ny
Reports the (estimated) stereo width in percent; can be higher than 100 %.
14. tts-tempo.ny
Gives the tempo in bpm for about 30 seconds of the selection.
15. tts-true-pan.ny
Same as the normal pan but the physical pan is taken into account,
e.g. for an imported track or for one that has been rendered with a
pan position <> 0.
tts-suite.wav
tts-suite-fast.wav
At least one of those files has to be present. The faster version
overrides the normal one. A plug-in will report if the file can't be
found and where it should be put in order to be loadable.
Cheers
Robert
On 21/09/2017, Andrew Downie <access_tech@xxxxxxxxxxxxxx> wrote:
Thanks for the explanation Robert. The next question, then is:The audacity4blind web site is at
Is it possible to measure the RMS in Audacity? If not, the knowledge is
largely academic unless one uses an external tool.
Andrew
On 19/09/2017 11:46 PM, Robert Hänggi wrote:
Hi Andrew
The record meter can stay at peak (we don't have spoken output for RMS
anyway).
I record at about -10 dB, especially if I have multiple tracks.
What we are actually after, is the crest factor which is a combination
of peak and RMS.
https://en.wikipedia.org/wiki/Crest_factor
A quote from there:
• Music has a widely varying crest factor. Typical values for a
processed mix are around 4–8 (which corresponds to 12–18 dB of
headroom, usually involving audio level compression), and 8–10 for an
unprocessed recording (18–20 dB).
End quote
The crest factor is actually Peak minus RMS (if both is in decibel).
Let's take the recommendation for ACX audio book recordings as example:
- peak not over -3 dB
- Rms between -23 and -18 dB.
Thus the Crest should be between 15 and 20 dB since
minus 3 dB minus (minus 23 dB) = 20 dBC.
Sounds horribly complicated. ;)
The essence is only that you can best judge the RMS if the peak is 0 dB.
Your voice or music may have a sweet spot at -16 dB RMS.
Now, if you've recorded something and the RMS is after normalization
to 0 dB (or amplification) still at e.g. -28 dB: then you have quite
evidence that there is an unusual high peak somewhere.
If the RMS is on the other hand at -10 dB, then it is likely that the
recording is clipped and distorted over a big portion.
Robert
On 19/09/2017, Andrew Downie <access_tech@xxxxxxxxxxxxxx> wrote:
For the first five minutes or so you should be able to adjust that levelThe audacity4blind web site is at
effectively with Amplify. Either raise or lower the level of that
portion until it matches the rest of the track. Then you can track down
those pesky screams and pull their levels back to what seems
reasonable. Having made those adjustments, careful use of compression
can be very effective.
Andrew
On 18/09/2017 11:52 PM, mk360 wrote:
Yeah, and is a good suggestion. this is the situation:The audacity4blind web site is at
I recorded a live concert using the ca-11 mics, ca-9200 preamp, with
an Olympus ls-14. Now I'm working with the recording but I configured
the levels too low on the preamp, and when I say low I say really low.
However, the thing is if someone scream on the mic (for example, if
the frontman say "scream for me santiago") that scream generates a
click, so when I try to normalize it fails because that scream
generates a loud click. The thing is it is a concert of about thwo
hours and these kind of problems only ocurs thwo or three times, and
in a context of a bootleg not are too notorious. So, I think I'll try
with your suggestion with peak meter.
the reason to not apply gain for all the track, and why asked for
something equivalent to shift g only for a portion of a track is that
when I started to record I changed levels, and now I need to adjust
these to the average levels of the song (that changes happened only on
the first 5 mins of the track, and the levels at the rest of the 2
hours are the same... low, but the same).
Regards,
mk.
El 18/09/2017 a las 5:46, Andrew Downie escribió:
Steve, that may all sound obvious but the issues you raised are trapsThe audacity4blind web site is at
for young players. I had an ongoing discussion with a brother about
this a few years ago while he grumbled that the level was too low and
insisted there was nothing that should prevent a higher level. I
eventually persuaded him to follow the below suggestion and, would
you believe it, there was one loud click.
Audacity has a few useful tools. Having made a selection, going into
the Amplify dialog will tell you how much below 0db the loudest point
is. But you then have to track down the loud point(s).
I like Peak Finder RFT in the Analyse Menu. It will find the peaks
and put a label at each of them. You can then decide, depending on
circumstances whether to delete the offending sound or lower its
level.
Andrew
On 17/09/2017 11:51 PM, Steve Jacobson wrote:
I don't use Audacity a lot but do quite a bit of sound editing. IfThe audacity4blind web site is at
"Normalize" isn't working on a selected part of the data, I wonder
if there might be something in the signal that is fooling the
process that isn't real evident by listening. For example, low air
conditioner rumble or turntable rumble in the case of recording a
record can be much louder than it seems likely by listening,
especially on small speakers. Some microphones will produce a lot
of low frequency energy when they are picked up or moved. A high
frequency sound can also cause this to happen. Also, depending upon
one's settings, one loud sound in the selection will affect what
"Normalize" will see as the peak level. One badly popped "p" can
even cause a problem.
One trick I have used is to play the selection at double speed and
half speed to be certain that there isn't a sound of which I am not
aware. The downside of amplifying if Normalize isn't working is
that if there is an undetected sound, it may get pushed over the 0
DB point. Sorry if all of this is obvious.
Best regards,
Steve Jacobson
-----Original Message-----
From: audacity4blind-bounce@xxxxxxxxxxxxx
[mailto:audacity4blind-bounce@xxxxxxxxxxxxx] On Behalf Of Andrew
Downie
Sent: Sunday, September 17, 2017 3:27 AM
To: audacity4blind@xxxxxxxxxxxxx
Subject: [audacity4blind] Re: Adjusting gain on a track
I suspect that Amplify is your only option. I have been playing with
some of the fade tools in the Effects Menu and so far have not found
anything relevant.
Andrew
On 17/09/2017 9:20 AM, mk360 wrote:
Hi,The audacity4blind web site is at
Can I adjust gain only on a portion of a track? I know that I can
use
normalice or ampliphy, but, something equivalent to shift g to
adjust
gain only for the selection?
Regards,
mk.
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