Many blocks make slightly different sounds to stone. Their hit volume is 0.27 rather than 0.37.

This issue is caused by the lack of sound definition in blocks.json. It defaults to normal.

This issue can be solved by changing normal to match stone, or defining the sound for all affected blocks to "stone" (Although for some blocks it makes no difference).

Here is a full list of block IDs with this issue:

• air
• barrier
• bee_nest
• beehive
• brick_block
• brick_stairs
• bubble_column
• camera
• cauldron
• cobblestone_wall
• coral_block (due to the key for this block being "sounds" instead of "sound")
• All elements
• enchanting_table
• end_gateway
• end_portal
• ender_chest
• flower_pot
• flowing_lava
• flowing_water
• invisibleBedrock
• jigsaw
• lava
• lava_cauldron
• light_block
• monster_egg
• movingBlock
• pistonArmCollision
• purpur_stairs
• quartz_stairs
• red_sandstone_stairs
• redstone_wire
• reserved6
• sandstone_stairs
• stickyPistonArmCollision
• stone_brick_stairs
• stone_stairs (cobblestone stairs)
• structure_block
• structure_void
• tripWire
• tripwire_hook
• turtle egg isn't affected for some reason
• water
• web

The attached resource pack and video make normal sounds into tones.