The subscriptions revenue is part of Google’s broader “Subscriptions, Platforms, and Devices” category-a new line item that the company previously referred to as “Google Other.” In the fourth quarter of 2023, the Subscriptions, Platforms, and Devices business generated $10.8 billion, up 23% year over year. At the highest price point is NFL Sunday Ticket, a partnership between the NFL and YouTube, that enables subscribers to access games for $449 per season. Next is YouTube Premium, previously called YouTube Red, that allows individuals to watch YouTube videos ad-free for $13.99 per month, and pays 55% of this to content owners who are being viewed by these subscribers. The lowest price option is YouTube Music, which enables users to listen to music, and watch music videos without ads, reportedly paying out $0.002 per stream to artists. The slide is modelled simply as a variable delay line in between the mouthpiece and bell.YouTube’s paid subscription offerings differ in access and price point. The bell reflection and transmission filters were hand-designed to have roughly the amplitude and phase profile described in Scott's thesis. I don't really know why that works, but it does more-or-less correctly adjust the resonances of the trombone to where I wanted them to be (when I just had the lips connecting directly to the bore, the resonances were shifted too high). The mouthpiece is the third port and is modelled as a 1-sample length tube with a resonator acting as the reflectance. I couldn't get Scott's mouthpiece model to work, so instead I modeled it as a 3-port scattering junction along with the lips and the start of the trombone bore. The lips are modelled as a a blown-open valve, with the spring constant corresponding to embouchure. The overall approach I used was a digital waveguide model, as described in J. I wrote the audio simulation in Faust, which conveniently compiles to WebAssembly and a Web Audio API wrapper. The g and f keys can be used to growl and flutter-tongue, respectively. (Just like on a real trombone!) The off-key resonances (7th, 11th, 13th, and 14th) are marked in red. ![]() Other notes are unmarked, and likewise the slide positions. The vertical dashed lines indicate the rough locations of B-flat (thick lines) and F (thin lines). The big gray wedge on the upper right indicates that the resonances are very close together there. Playing over white space means that one is between resonances and the note quality won't be as good. The diagonal colored lines are a guide to where the resonances are: playing over a resonance means that the embouchure and slide length are matched. ![]() ![]() The main controls are to move the cursor (or your finger on a touch device) left and right on the picture to adjust the embouchure, and up and down to extend and retract the slide. Physical models of the lips, mouthpiece, slide, and bell are digitally simulated. This simulator is a physical model of a trombone.
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