measuring bps

[jahlad]

ok im building myself a new marker that is how shall we say, a little 'different' to all other cockers ive ever fired, and although i havnt got it ready yet, i just know this thing is gonna be fast.....but i wanna be able to work out how fast.

i can take the values from my eblade and work out the max bps, easy.

BUT
how can a i work out the actual bps, i know it can be done with a sound file of the marker, but how and with what software???

also, can some chronos calculate it?

 

[joe bob]

see how many shot you can get of on ten seconds then divide the # of shots by 10

 

[Shuck]

Or get a mate to stand infront of you with your marker and fire at him for 10 seconds. Then divide the number of welts by 10

P.S Make sure the friend is wearing a mask or else you are not playing safe

 

[jahlad]

yeah but there has to be a more acurate meathod than that

 

[Shuck]

Whats up with my method? I suppose if the grouping is tight, counting welts maybe hard!!!

 

[Ben Frain]

I believe there are some chrono's that do it but cheaper will be a sound file.

Cooledit, Soundforge etc are best bet on a PC or a video editing app that gives waveform on audio e.g. Premiere, MSP

Final Cut Pro/Express will do it on the mac, as well as countless others.

Record the marker, preferably with a DV camera firing for say 5 seconds.

Import the clip into package. Take a one second chunk (you can do this accurately by looking at the DV timecode) and then look at the wave form between the in and out point. Count the 'peaks' (which show the audio profile of each shot) and hey presto - bps

 

[Collier]

Originally posted by Benfrain
I believe there are some chrono's that do it but cheaper will be a sound file.

Alot of chrono's that give a rof readout use sound, useless for a cocker as it counts the back block slap, hense why some people believe they hit 20 bps witha revy and an eblade.

Paul

 

[Skeet]

Peice of pi$$ mate.
Open windows. In acccessories you should find a Media option, find Soundrecorder.
Now just fire the marker near the computer.
Fire as much as you like.
Find the best string of shots.
Then chop the whole recording down to only include the best string, using the "Delete Before" and "delete After" options in "Edit"
Then, slow it down by using "reduce speed by 100%". You can do this as many times as you need to to:
A: Find the first shot and remove any "dead time" before it, the same with the last. This way you dont have any excess time showing on the recording, which will affect your result
B: Accurately count the number of shots heard.

Once you know how many shots you have in the sample, bring it back up to normal speed, then divide the time shown by the number of shots.
So, you might have 12 shots in 0.73 seconds.
0.73/12 =0.0608333 seconds per shot.
then divide this by 1 which = 16.438 something BPS.
Mail me at gary.brooks@blueyonder.co.uk and i will send you my file for my RT.
Hope this helps.
Gaz

 

[joe bob]

*wow*

 

[Skeet]

Yeah I know, clever huh?!!LOL
Just recorded my RT at 18.something BPS last night!
Gaz