## Search found 321 matches

Sun Aug 10, 2014 10:19 am
Forum: GBDev
Topic: Question about Channel 3 Waveform
Replies: 2
Views: 2741

### Re: Question about Channel 3 Waveform

One thing to verify is that you have the playback/output frequency of Sound 3 correctly calculated. At least for me, I misread the documentation and had the frequency playing twice as fast. Sound 3's Frequency Timer actually runs at half the rate of Sound 1 and Sound 2's, so naturally the playback/o...
Thu Feb 13, 2014 7:33 pm
Forum: GBDev
Topic: ems-flasher for linux: multirom support
Replies: 1
Views: 2545

### Re: ems-flasher for linux: multirom support

This will be very useful to me at least. I recently got mine last November, and while I could deal with uploading one ROM at a time, multirom support is fantastic to have.

Great work, I'll have a look at it this weekend.
Thu Feb 13, 2014 7:30 pm
Forum: GBDev
Topic: Sound 4 (Noise): Highest frequencies?
Replies: 17
Views: 6978

### Re: Sound 4 (Noise): Highest frequencies?

According to pandocs , FF22 - NR43 - Channel 4 Polynomial Counter (R/W) [...] Bit 7-4 - Shift Clock Frequency (s) Bit 3 - Counter Step/Width (0=15 bits, 1=7 bits) Bit 2-0 - Dividing Ratio of Frequencies (r) Frequency = 524288 Hz / r / 2^(s+1) ;For r=0 assume r=0.5 instead This one equation should a...
Wed Feb 12, 2014 11:15 pm
Forum: GBDev
Topic: Sound 4 (Noise): Highest frequencies?
Replies: 17
Views: 6978

### Re: Sound 4 (Noise): Highest frequencies?

Thanks for all of the replies everyone, I really appreciate your advice and taking the time to help me. I'm still very confused about how the Game Boy Sound 4 actually determines the noise channel output frequency and the frequency at which it runs the LSFR as a Psuedo-Random Number Generator. I'm a...
Sun Jan 26, 2014 10:24 am
Forum: GBDev
Topic: Sound 4 (Noise): Highest frequencies?
Replies: 17
Views: 6978

### Re: Sound 4 (Noise): Highest frequencies?

Thanks tepples. See, I've dealt with images and pixels for years, but I literally just started getting to grips with sound programming months ago (no joke, had no idea what frequencies and periods really meant until October :p). I'll definitely have a look at both methods.
Sun Jan 26, 2014 10:13 am
Forum: GBDev
Topic: Sound 4 (Noise): Highest frequencies?
Replies: 17
Views: 6978

### Sound 4 (Noise): Highest frequencies?

For some reason, I'm finding the GB's Noise Channel (Sound 4) the most troublesome to fully understand. I'm trying to wrap my head around how it works, but I still have a couple of major questions. 1) Is the highest frequency for Sound 4's programmable frequency timer really 524288Hz? For example, a...