Hi all, hows it going?
I have been working through Hernandez's video on using GEM to display a video. My idea is to have a video with no sound, but sound comes from a patch that the user can control to match up with the video.

1. The video does not always load (both .mp4 and .mov work). It seems to work fine the first time after opening patch but not so much after that.
   --- Is there a way to have better transport control (play, rewind etc) I have a toggle set up which works as a play pause button. But rewind, or back to start would be great.

2. The slider I have set up to control the sound source works well, but at a certain point it crackles and then stops outputting sound, only to return again. in short, there's a dead spot at a certain frequency and I've no idea how to fix it. Later I will be assigning control to the mouse wheel.
   race car fun copy.pd

Patch attached above (any clip on your computer should work, it doesn't have to be in same folder)

Thanks for reading

@delphineTA said:

The slider I have set up to control the sound source works well, but at a certain point it crackles and then stops outputting sound, only to return again. in short, there's a dead spot at a certain frequency and I've no idea how to fix it. Later I will be assigning control to the mouse wheel.

Sadly PD doesn't play well when using GEM and audio in the same process (patch). Normally you need to start 2 pd instances and use netsend/netreceive to communicate between both patch.

Are you using pd-extended? If yes, there's a bunch of abstractions (helpful tools) to deal with videos in mtl (check my signature for the link to download (github)).

Cheers~

Thanks for the reply.
Do they have to be two completely separate patches? I just tried it again and the video is now making this constant crackling sound.
I am indeed using Pd extended, I'll have a look at your abstractions link thanks.

In response to the slider issue that happens with or without the video. Copy and paste it into a patch on its own and you'll see what I mean. Its almost quite a convincing engine sound (from Farnell book, that I tweaked) . When you get to a certain spot high in the 'rev range' it crackles and dies for a bit then re-appears higher up.
Any ideas?

@delphineTA Hello Delphine......
The sound problems don't seem to have anything to do with gem. Here is your V8 (just the sound part) patch with an oscilloscope that you will be able to see if you are using extended. The problems are identical without the video part.
Your V8 patch produces a DC component (just volts not oscillating) all of the time but especially where there is crackling. I think the different waveforms maybe also cancel each other out at those frequencies as well......... but it could be just DC (direct current) overload. You could try generally reducing levels within the sub-patch........ and then boosting them up again for the final output.
v8.pd
David.

Thanks for the advice. I reduced the sig~ of each 'cylinder' to 0.8 and that seems to have narrowed the blank gap in the sound somewhat. I will explore some more a little bit later, What was immediately obvious to me is how the wave goes right off the oscilloscope but the db meter still registers sound.

I have another problem which has come to light.

Right now Im trying to figure out how to record a sequence with one synth and play over it with another. i have the number pad set up as a hid. (12 note tempered scale. My ideas are always beyond my grasp.

Im guessing an array will be used to store the first sequence. What would be cool would be to play over that and when ya find a bit ya like hit rec and hear the 2 playback.

I'll keep digging but I might start another topic.

Here's a peek.
synth rec.pd

@delphineTA @sglandry was working on something similar, and posted his / her solution here........
http://forum.pdpatchrepo.info/topic/9719/looping-station-patch-pedal
David.

Looks great I'll give it a whirl.
Thanks for your help