Glass blocks and doors

Hi - newbie here (go gently) hope you can help... I am constructing a studio from a single skin brick garage at the bottom of my garden (in the UK). The garage is at least 20-25 metres from any neighbouring properties. My band consists of a drummer and 2 guitarists and are fairly loud. I would like to make sure I don't annoy my neighbours too much, although they are fairly good about noise. I have included a plan of the garage as-is, showing where I intend to put double glazed glass doors. One on the north wall of the garage, opening onto my garden and the other as a crude bit of isolation between the control room and the practise/live room. My first question is whether these acting together, will reduce much of the noise getting from the live area to outside the north side of the building. I have also included a drawing of the construction I was thinking of using on the walls (resilient bars onto timber frame with rockwool and 2 layers of plasterboard). My next problem is this... I would like to get light into the south side of the building by using some glass blocks I have left over from another DIY project. I realise these on their own are not great at reducing noise (they are not the air filled specialist blocks you can get). But I wondered if by using them as a double skin, allowing light through, with an air gap in the middle would make a significant difference to the noise escaping. My drawing shows how I was thinking of building this. The glass blocks would be fixed in position by mortar on the outside skin, then by a frame in the stud wall and mastic/sealant joining the brick to the frame and the plasterboard. Any thoughts/advice on this would be much appreciated. Thanks for your time...

welcome! could you update your profile to include your location! thanks! what option do you have to build a stud frame wall inside the existing garage wall plus a proper stud frame double leaf wall between the two rooms? plus you need to consider your ceiling so the stud walls could be used to support an isolation ceiling which should then get your exterior sound levels down. with the stud walls, you will not need the RC which in turn will improve your LF isolation. then your doors and windows on the inside sit in the isolation walls separated from the existing brick walls. as shown, you are effectively coupling your drywall on RC to the existing wall which will not be good. building isolation risers for the drums and amps will help avoid transferring directly into the floor. it also looks like you're planning on square rooms which will be harder to treat because of the reinforcement of common modes. what size is this garage? you might be better served with a diagonal wall between the rooms and turn the desk to the side wall.

Hi Glenn - thanks that's great... I have updated my location. The garage is 6m x 4m. I had planned to put in a ceiling off the wall studs, again using resilient bars and 2 layers of plasterboard so it should isolate the sound well - I had also planned to put isolation cradles on the concrete floor and run joists in these before filling with rock wool and then chipboard on top. The angled wall is a great idea and I can easily do this as shown in your sketch. I don't have much choice in terms of the glass doors onto the garden as I have to reuse some that were taken off the house I've been rebuilding (they are almost the same size as the width of the building!) The only way I can really think of isolating this from the brickwork is to use expanding foam and not use any bolts to secure it - then run the inner wall round, and mastic/seal any joints. Would this work to any degree?

i'd build a frame for the window doors and isolate the frame - this might take some creativity to mount on the outside of the building - maybe creating a block/brick extension to encase it? or perhaps there is an option to cut down the glass and reduce the doors?. you don't need RC is the inner ceiling joists are supported on the inner isolation walls.