Even though I have often recorded alone, I still feel the best music is made by musicians playing off each other.
What happens is that your wretched memory remembers the words and forgets what's behind them.
Dave Sim said in his latest thing of his, 'when you're on the right track, you'll know it, but until you get there, you have to believe you're on the right track'. Interesting little conundrum. It's not easy.

