What are good techniques to bend notes on brass instruments

Question

I play Eb tuba, and sometimes I come across bending down in my notes - either as an effect at the end of a note, or sometimes as a slide between two notes. I find this difficult to achieve with a good result, even using some kind of half-valve technique. Do you have some good descriptions on how to do this succesfully?

Examples

"Effect" at the end of a note:

Example is taken from the Frasier theme (from the TV series). See the last note.

Slide between two notes:

Example is taken from a short intro to the Michael Jackson song "Don't stop till you get enough".

Answer 1

I think half-valve is the only technique that would be effective.

Try to find a valve position that gives you the flexibility. It can involve any number of valves in any position (whatever if they are involved in the start or the end tone). Once you find a position where you can have a rather large range, use that for your drops and falls.

In these examples you do not need to play as a trombone would have, it's not meant as a clean glissando.

What could help - and in my opinion even have a positive effect - is to play quieter under the gliss. If you play loud you would have a hard time not to get to whatever tone you'd land on.