The real question is what exactly are you looking for and how much are you willing to pay. If you are looking for a good GM synth you already have been given the best options. Personally I use the TTS-1 for my GM.

However if you want the best MIDI sounds you will need to spend more money. The starting point for this IMHO would be Kontakt and that runs around $400. You could also spend thousands of dollars on MIDI sounds, but that is way out of my price range. I use Kontakt as my go to MIDI sound source.

Note that no GM sounds will be as good as the expensive alternatives.

Other options is to get the free Kontakt Player or the free SampleTank 3 Player. There are many great sounding third party patches that play in the Kontakt Player, you just have to read the patch description to make sure. There are also patches that you can purchase for the SampleTank 3 Player. Note that these are not GM so you will have to set the MIDI track and channel for each sound. This is the same as the free SanpleTank 2.5 that comes with BiaB.

All of the above assumes that you have a knowledge of MIDI controls, i.e. CC numbers and pitch bend. These are not hard to learn. Remember if you take a BiaB MIDI track and play it on the best MIDI sound source available it could be very static sounding without some addition of MIDI controllers. This is not true of all BiaB MIDI tracks but it is for many of them.

Don't be afraid of MIDI but remember that there is a learning curve to get the best out of it.

I hope this helped.

{edit - addition} don't forget that you can mix and match and sounds from all of suggested sources thus far. That is you can have one track on a GM sound source, one track on the free Kontakt player and another track on the free Sampletank 3 Player. In other words you are not limited to one sound source.

Last edited by MarioD; 11/06/16 04:14 AM.
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64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware