Only from iStock
[TEST TONES] EBU R128 Spec 1kHz -20 -26 -40LUFS - Music Clip
1 credit All file sizes are now the same price.
XX credits All file sizes are now the same price.
All iStock audio clips are 16 bit .wav
You need XX iStock Credits to download this audio clip
You need 1 iStock Credit to download this audio clip
This image is available with your subscription
You've still got downloads left for the .
Are you sure you want to use credits?
You've got XX/XX downloads / remaining.
Having troubles with the download? Start downloading
You can return to re-download this image at any time before your subscription term ends.
You have 0 subscription downloads left
It looks like you're out of subscription downloads for the but you've still got XX iStock credits in your account.
It looks like you're out of subscription downloads for the
You can still download this image with iStock credits.
Unable to download file
We're unable to process your download at this time. Please try again later. If the problem persists, contact us
The European Broadcasting Union developed a recommendation (R128) for broadcast loudness based on ITU 1770.
Here is a collection of three test tones, each 20sec longs. It has a 1kHz sine wave, first at -20LUFS then -26LUFS then -40LUFS. (LUFS is exactly the same thing as LKFS.)