maccarthyconor said:
At a masterclass given by Duncan McTier, he showed (with german bow) a bowing technique he called 'paddling' which created a continuous sound. I haven't been able to recreate it on french bow, but at the bow changes he alters the angle of the bowstroke to what looked like 45 degrees (ABOVE straight) and increases bow speed, simultaneously changing the contact point by 'pulling 'it higher, then when starting the 'next stroke', he does the exact same thing except mirrored (bow angle is 45 degrees BELOW straight). I almost got it a few times, and it doe sfeel like you're paddling throgh water because of the resistance of the string.
For the momne tI'm happy not having the ability to create a continuous sound, just changing bowstroke 'musically' (hiding it in the logic of the music).
Okay...this is really hard to talk about without seeing or hearing any of this in practice, but....
When you say he changes the angle of the bow 45 degrees, I assume you mean as viewed from head on i.e. 45 degrees from the longwise direction of the string?
If so, and if you check some of what I said on my 'Legato Bow' thread, I really have my doubts if this is truly what is creating the legato effect. I'm not saying McTier is not actually making a fairly legato sound (he's a much better player than I am), I just suspect this isn't actually how he's doing it.
Unless I'm missing a major point of physics, drawing the bow along the length of the string (from fingerboard to bridge, or vice versa) creates virtually no usable sound. (try it yourself - draw your bow only up and down along the length of the string and listen to what you get) In other words, the side to side motion is what makes all of the usable sound.
In the vector analysis of it, the X (side to side) component creates the sound. The Y (up and down) component makes no sound. Therefore the maximum sound is produced by drawing the bow precisely side to side. ANY introduction of a Y component will do nothing but take away from the volume.
So drawing the bow at say a 45 degree angle will still contain part of the X direction but will contain an equal amount of energy in the Y direction, which makes no usable sound. In other words, it's a complete waste of energy (in fact, it will even add noise to your sound).
For those of you who are really physics minded, to extend this further, as you draw the bow, the more you angle the bow (increasing the Y component) the more the X component is slowed down. So if you were to start the bow stroke completely perpendicular to the string and by the end of the stroke had angled the bow completely vertical (to wind up completely along the line of the string), you would have effectively slowed the X component down to a stop by the end of the stroke.
Since the Y component doesn't do much for your sound, you could achieve exactly the same effect (with less 'noise') simply by drawing the bow in a completely perpendicular manner and slowing down to stop.
So anyway, I just don't see what cranking your arm up 45 degrees can honestly do for you from a physics standpoint.
If my thinking is flawed, I would love for somebody to explain to me what I'm missing. I'm just trying to find the most efficient way to make a smooth bow change, so I welcome any other ideas.
