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BMS Edit Tips & Tricks:

 

A very useful function is the BMS Edit Scrub which enables to find the exact location not just by viewing but also audible.

 

Say you would want to move and paste a clip to a specific position in another clip, then do like this:

1 Locate the starting point of the clip you would like to move with right mouseclick scrub

2 Then Press the left mousebutton too so both mousebuttons are pressed and hold, then move the whole thing as it scrubs to the exact location in the other clip and release when you are happy.

 

 

In order to facilitate recordings there are recording markers that are easy and nice to use.

Take a look here: Edit recording markers

 

 

Optimizing perfomance with BMS Edit Radio

In order to optimze perfomance one of the most influential settings is how many undo steps that are configured in the ini file. A higher value will decrease perfomance and a lower impoves it.

The reason is that memory consumption increases with a higher value since the state of the project is stored fpr each step. We recommend as low as 1 to 2 steps if you are working with big projects with lots of editing. Then a gain for small scale projects a value of 10 is okay.

 

Another problem with large projects is when they are zoomed in and out with the volume envelope tool in its "on" position which really delays the graphics. For this reason we recommend that when you are about to zoom turn the volume enevlope tool off before zooming and turn it on when you need it. This really improves the speed significant. The same thing goes for the Pan envelope tool.

 

Audio quality

Digital audio is a digital image of the analog audio where samples have been taken at a specific rate and with a maximum resolution/magnitude. There are all sorts of resolution/magnitudes but the most usual are 8, 12, 16 and 24 bits representations. When talking bits we refer to how many bits that is used to note the magnitude for each sample. Considering 8, 12, 16 and 24 bits it may look as if 24 bits max value is just 3 times 8 bits max value. Luckily that’s not the case, it’s so that 8 bits are 2^8 which equals 256, 12 bits are 2^12 which equals 4096 , 16 bits are 2^16 which equals 65536 and finally , 24 bits are 2^24 which equals 16777216 a whole sixteenmillionsevenhundredseventhyseventhousandstwohundredsixteen different digits you can write using 24 bits. Now, that’s a lot of digits, perhaps a little something for your next paycheck.

As you now understand 24 bits is not just three times eight (3 * 8) bits in our digital audio world.

 

Why is that important?

It is because this is the accuracy with which we can describe the analog audio.

Think about the resolution in a picture, the fewer pixels, the less picture quality, the more, the better picture quality.

 

Now sampling 48000 times per second using 24 bits is a lot of writing but that’s necessary if we want to hear the very most delicate high tones at up to around 20 kHz and no less hear the overtones which bring by the feeling of many sounds.   

 

Yes speaking of sound, feelings and delicate tones it is not possible to describe delicate tones using 8 bit audio because the resolution becomes too un-precise.

If a sample is say 4,458792154 when you measure it but because you only have 8 bits you have to write 5 it will not bring about the feelings and delicate tones when played back. Now that also affects the higher tones since they will not fit in the 8 bits. So it’s not just the sampling rate that controls the higher tones.

 

Comparing Analog world to the digital is not so easy but here are a few facts:

First of all, digital audio is just and image of the analog audio. All the samples in a file are needed to build the audio properly.

Both those before, and those after any given sample position in a file.  Scary but that’s a fact.

What makes the digital audio world tick is the impulse response of a capacitor. Which is sin(x) /x.

In practice in a 16 bit world ,after 24th and before the 24 th sample do not influence the current sample at any given sample due to the roughness of 16 bits.  

For every bit you use you get 6 dB dynamics so 16 bits is 96 dB, 8 bits 48 dB and 24 bits 144 dB.

The very, very, best analog to digital gear S/N is around 112 dB and so 112/6 is around 18,5 bits using 24 bit quantization.

This means that 24 bits leave up to 30 dB to use for other purposes.

In an analog sound you use up and down with levels without destroying the quality too much but try to do that to 16 bit audio. That listening will not provide you with goose-bumps.

However using 24 bits therefore leaves some room for audio levels and so that can be used in mixers and editors etc.

 

Conclusion:

Use 24 bits whenever possible for the sake of your audio quality

 

Now you may wonder why nearly all commercial audio like for example Audio CD (came in 1981) is 16 bits.

Well 16 bits can sound really very good, but it is really complicated to be bound by 16 bit limits while you produce the audio.

 

So use 24 for production and render 16 for delivery when and if you need to.

 

 

Using the ACM when mixing to file

When you want to produce a file using audio compression there are a few things to consider if you want the best audio quality.

As with all 16 bit audio its really important to use the full 16 bits of the system and especially in order to make it possible for the compression algorithm you choose to do its best. Ideally the top should go to the full 16 bit resolution but that is really complicated so you will have to compromise to some extent keeping in mind that the “louder” the better.