Join for FREE
It only takes a minute!
ZEISS Summer Savings - Experience unique moments of nature. Save up to £250 on selected ZEISS Binoculars - limited time only!

Welcome to BirdForum.
BirdForum is the net's largest birding community, dedicated to wild birds and birding, and is absolutely FREE! You are most welcome to register for an account, which allows you to take part in lively discussions in the forum, post your pictures in the gallery and more.

Settings For Nocmigging

Reply
 
Thread Tools Rate Thread
Old Monday 29th July 2019, 15:56   #1
Louis_P
Average Birder

 
Join Date: Dec 2016
Location: Norfolk
Posts: 334
Settings For Nocmigging

Inspired by recent Twitter posts about loads of Sandpipers being recorded by nocmigging recently (last night in particular), I hastily put together a rig to put out tonight (probably a day too late though) which I have been meaning to do for some time.

I have one question though, what audio settings are best for nocmigging, balancing file size and picking as many calls as possible? I guess wav files are better than mp3. The sampling rate and the bit depth though, I'm not sure on.

Thanks,
Louis
Louis_P is offline  
Reply With Quote
Old Tuesday 30th July 2019, 07:41   #2
Fat Paul Scholes
My real name is Mark Lewis

 
Join Date: Mar 2008
Location: Aberdeen
Posts: 2,641
tbh, for nocmig I really don't think it matters. You will record calls that are identifiable and those that are not, and I strongly suspect that the key factors in determining this will be loudness of the call and proximity to the mic. I can't imagine a scenario where, for example, the difference in quality between .WAV and .MP3 would render a call identifiable or not. If you're going to use audacity, the default settings are fine.

Also, there's no need to worry about file size (unless your computer is on it's last legs I guess). I never save a whole nights nocmig recording - I just leave it open in audacity and cut out and save any interesting bits when reviewing it. You end up with some massive files on long wintery nights and my laptop struggles to save these, but seems to have no problem holding them while audacity is left open.
__________________
My website: https://lewissparky.wixsite.com/website
Fat Paul Scholes is online now  
Reply With Quote
Old Tuesday 30th July 2019, 10:20   #3
peter.jones
You may say I'm a dreamer.. but I'm not the only one

 
Join Date: Jun 2010
Location: Hants
Posts: 1,424
Quote:
Originally Posted by Fat Paul Scholes View Post
tbh, for nocmig I really don't think it matters. You will record calls that are identifiable and those that are not, and I strongly suspect that the key factors in determining this will be loudness of the call and proximity to the mic. I can't imagine a scenario where, for example, the difference in quality between .WAV and .MP3 would render a call identifiable or not. If you're going to use audacity, the default settings are fine.

Also, there's no need to worry about file size (unless your computer is on it's last legs I guess). I never save a whole nights nocmig recording - I just leave it open in audacity and cut out and save any interesting bits when reviewing it. You end up with some massive files on long wintery nights and my laptop struggles to save these, but seems to have no problem holding them while audacity is left open.
you record "Live" into Audacity?
I've only ever recorded into a recorder and opened the file in Audacity the next morning. My (old) laptop struggled with larger files.
I did have a command to trim the files into smaller chunks.
__________________
Blogging since 2006!: https://pdjwildlife.blogspot.com/
peter.jones is offline  
Reply With Quote
Old Tuesday 30th July 2019, 10:57   #4
Fat Paul Scholes
My real name is Mark Lewis

 
Join Date: Mar 2008
Location: Aberdeen
Posts: 2,641
Quote:
Originally Posted by peter.jones View Post
you record "Live" into Audacity?
I've only ever recorded into a recorder and opened the file in Audacity the next morning. My (old) laptop struggled with larger files.
I did have a command to trim the files into smaller chunks.
Yes, with a USB mic. By far the easiest way to do it as it means you don't have to spend ages transferring and saving massive files. Just don't close the window before you've finished with it!
__________________
My website: https://lewissparky.wixsite.com/website
Fat Paul Scholes is online now  
Reply With Quote
Old Wednesday 31st July 2019, 08:19   #5
Louis_P
Average Birder

 
Join Date: Dec 2016
Location: Norfolk
Posts: 334
Okay, thanks for the tips. I've got loads of hard drives to back up recordings on so I might as well record top-quality wav files. Recording live to audacity may be a bit difficult for me as I don't have a proper PC (I'm using Audacity on my Raspberry Pi though) but is a good idea.

How do you quickly review recordings? I looked at the sonogram 30 seconds at a time and then skipped to the next 30 seconds and so on, playing back any interesting bits but it still takes forever. I did find a Common Sand that called once as well as Tawny Owl (although I doubt the owl was migrating).

Thanks,
Louis
Louis_P is offline  
Reply With Quote
Old Wednesday 31st July 2019, 11:49   #6
Fat Paul Scholes
My real name is Mark Lewis

 
Join Date: Mar 2008
Location: Aberdeen
Posts: 2,641
I have approx 15 second 'screen width' when reviewing, but I'm sure that 30 seconds is fine. I only use that one as that's the default that you get when you record direct into Audacity.

I reckon I'm looking at about 10 - 15 mins reviewing per hour of recording. Slightly longer at this time of year when I'm surrounded by lots of breeding herring gulls, which make a lot of noise at night, and have quite a bewildering variety of calls. As you learn the shapes of the calls of the common stuff (for me, herring gull and oystercatcher) you can skip past without listening to most of them, so you will get quicker with practice.
__________________
My website: https://lewissparky.wixsite.com/website
Fat Paul Scholes is online now  
Reply With Quote
Old Wednesday 31st July 2019, 12:46   #7
Louis_P
Average Birder

 
Join Date: Dec 2016
Location: Norfolk
Posts: 334
Oh, I'm not too slow then! Even with 10-15 mins per hour (I'm probably half of that speed at the moment as I try to research what birds are as I go along) that's quite a lots of time though.

I don't have loads of background calls other than a distant Tawny Owl that I have got used to already on the recordings but my main problem so far comes from a noisy neighbour. Every now and then all through the night, I hear some rustling, a door slam and a dog barking. They are all recognisable on the sonogram though so I can get used to them too.

Regarding what I've actually heard, I was a day late for lots of the sandpiper migration but I've still had a Common Sandpiper, a Moorhen (I think), and possibly one or two other things (I think most of them are Tawny Owls making different noises though).
Louis_P is offline  
Reply With Quote
Advertisement
Reply


Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Nocmigging Sound Recorder. Simmo1111 Bird Sounds Recording Eqpt & Discussion 7 Sunday 8th April 2018 14:59
SX 50 Settings? shezza Canon 1 Wednesday 26th June 2013 16:43
EOS 350-d settings grantlumsden Camera Settings 2 Friday 4th April 2008 19:59

{googleads}

Fatbirder's Top 1000 Birding Websites

Help support BirdForum

Page generated in 0.13196206 seconds with 20 queries
All times are GMT. The time now is 11:01.