Can somebody please explain the collé motion and how to practice it to me? No matter what I do, I cannot execute it.
(I think the bowstroke essentially is useless in performing music. However, pedagogically speaking it is very useful.)
I've heard this stroke described as "pizzicato with the bow." You need to generate a moment of significant friction followed by quick release. I've never seen it spelled out in the kind of detail that Prof. Berg has done for you, but it sounds like what I'm already doing (not that I do colle especially well, but that's on me).
Lucien Capet recommended this as a good energising preparation for spiccato: like saying "ta" rather than "tcha" or "tshwa"? A clean, crunch-free attack.
Yes ... the viola is comparatively unresponsive.
Roy Sonne's video on Mazas 3 explains very patiently how to play collé (https://www.youtube.com/watch?v=YAx30Qu3BFc). For my taste he takes the etude considerably below the ideal tempo; he is generally a patient person, requiring us to be patient too.
The link Albrecht gave is mistakenly that of Roy Sonne on Mazas #2; here is the one he intended:
Thank you for correcting the link! What I like best about Roy Sonne is his insistence on "artistry" and "musicianship" as he calls it. But I have to say that he puts a strain on my patience at times.
Thank you for the responses, everybody!