Hello all, nOOb here. I would like to know the proper technique of strumming more than one string at a time while playing with the fingers. I'm learning a "Bach for Bass" song that requires hitting the A and D strings at the same time, followed by the D and G strings. I initially started by trying to use the left corner of my right thumb but could not get a smooth strum. I then switched to trying to hold my thumb and index finger together, like holding an invisible pick, and then strumming with the top of my index fingernail. This seems to be working out better for me than the thumb method, and closely resembles the sound I'm hearing on the recording of the song. Is this an ok, not ok, technique to use? Is there a "proper" technique used to strum while playing finger style? I am taking classes at a local music shop, but have not covered this yet with my teacher. Any info would be appreciated. Thanks.