This is curious... My comment is at the bottom of this thread.
Source: Yamaha Recording Custom
"Birch shells deliver a lower fundamental tone than maple. As a result, they project a warm, rounded sound with a slightly shorter decay, ideal for the controlled environment of the studio."
Source: Tama Starclassic Performer
"Now pro drummers can choose between the brighter, tight sound of Starclassic Maple or the darker tone, strong projection, crisp attack and aggressive open sound of Starclassic Performer birch."
Also from the Tama website...
Snare Drum Concepts: "Tonal Spectrum Chart"
The Starclassic Performer Birch snare drum according to this chart is the warmerst and darkest sounding of the whole range of snare drums, darker and warmer than the Maple snare drum.
Product Review - Interview with Paul Crosby (Saliva)
"TAMA: How do you compare the sound of the birch shells, as opposed to the maple shells you had been playing previously?
Crosby: Maple, obviously, is a little bit louder, but these definitely have a darker tone and a deeper tone, so if you're running it through a PA system anyway, you don't really have to have the volume of maple. They're definitely deeper and darker.
TAMA: How do you find the slightly darker sound of your birch shells compliment your style of music?
Crosby: Actually, I'm all about having deepness in my tones. I want to have everything as deep as possible, as opposed to high pitch. And the birch shells have enabled me to actually go a little bit deeper than I normally would on a maple kit without getting sloppiness from the head. I don't have to loosen the head as far to get the actual deepness out of them."
Many say Birch sounds bright whereas Maple sounds warmer. This information seems to suggest the opposite, that Birch is warmer, darker and has a lower fundamental pitch than Maple.
If Birch sounds indeed warmer, then that will be the wood of choice for my new kit! I want the warmest and darkest sounding drums and Birch is also preferred by studio engineers due to it's "pre EQ-ed" sound (Boosted lows and highs).
Anyone want to discuss this issue? Thanks and happy new year!