VRC6方波最大音量和2A03方波最大音量差不多; VRC6的三个声部似乎是线性变化的; 根据之前DAC中给出的 线性逼近 的公式: pulse_out = 0.00752 * (pulse1 + pulse2), 可知线性因子大概是0.00752, 由于不太确定, 可以根据情况上下浮动. 要点

2018年11月20日 · At maximum volume, the pulse channels of the VRC6 are roughly equivalent to the pulse channels of the 2A03 (except inverted). The DAC of the VRC6, unlike the 2A03, appears to be linear. The final mix is a 6-bit DAC summing the two 4-bit pulse outputs and the high 5 bits of the saw accumulator.

Test ROMs and NSFs for NES and Famicom expansion audio. This collection is for testing various details of audio, and verifying emulator implementation. Pre-built ROMs can be found in the build/ folder. Relative volume tests: db_apu - Full volume APU square vs. APU triangle. db_vrc6 - Full volume APU square vs. full volume VRC6 square. Hotswap.

VRC6 附加声音芯片用于 Konami 的 基于 VRC6（对应 Mapper24 和 Mapper26）的游戏（例如著名的《恶魔城 3 日文版》）中，目 的是增强声音效果，弥补 NES 自身 APU（2A03）芯片处理能力的不

2014年12月29日 · At maximum volume, the pulse channels of the VRC6 are roughly equivalent to the pulse channels of the 2A03 (except inverted). The DAC of the VRC6, unlike the 2A03, appears to be linear. The final mix is a 6-bit DAC summing the two 4-bit pulse outputs and the high 5 bits of the saw accumulator.

2025年2月11日 · On 053329, an unknown input 2-4, 45-47: goes to a 6 bit DAC, and then mixed with system audio The DAC is a 6-bit R-2R SIP resistor array with an additional internal 2K resistor in series to the output.

2005年5月19日 · The VRC6 test ROMs (VRC6TEST for mapper 24, VRC6TESA for Mapper 26) then play fifteen volume levels of a single square wave, then fifteen volume levels of a single saw wave with the lower two bits of the six-bit "accum rate" register forced to 11b.

2011年4月4日 · Some idea brought up by several members in the CICOprocessor thread have led me to a mcu synth design which can be configured to mimic VRC6 audio. The focus of this thread is to cover the actual mcu implementation which can be easily adapted to a chosen mcu.

MAmidiMEmo is a virtual chiptune sound MIDI module using a MAME sound engine. You can control various chips and make sound via MIDI I/F. So, you don't need to use dedicated tracker and so on anymore. You can use your favorite MIDI sequencer to make a chip sound. See samples https://www.youtube.com/channel/UCGYO2bEPPIM2LTNDbBEDaAQ.

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