Enum FilterModel 

pub enum FilterModel {
    NesRf,
    Famicom,
    Clean,
}

v2.1.3 — the analog output-filter model the APU emulates.

The console hardware genuinely differs here (nesdev “APU Mixer”): the NES front-loader’s RF/composite circuit high-passes aggressively, while the Famicom uses only a gentle 37 Hz high-pass. Clean is a modern full-range option (no aggressive high-pass — the character Mesen2 / FCEUX / Nestopia produce, which omit the 90/440 Hz cascade). This only affects the tonal balance of the output; it never changes channel content.

Variants

NesRf

NES front-loader — HPF 90 Hz → HPF 440 Hz → LPF 14 kHz (nesdev). The authentic (and thinnest) output; byte-identical to ares/tetanes. Default.

Famicom

Famicom — a single HPF ~37 Hz → LPF 14 kHz (nesdev Famicom spec). Much fuller low end than the NES RF circuit (drops the 440 Hz HPF).

Clean

Clean / full-range — only a gentle ~10 Hz DC-block HPF → LPF 14 kHz. Keeps all bass; closest to Mesen2 / FCEUX (which apply no high-pass).

Trait Implementations

impl Clone for FilterModel

fn clone(&self) -> FilterModel

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for FilterModel

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for FilterModel

fn default() -> FilterModel

Returns the “default value” for a type.

impl PartialEq for FilterModel

fn eq(&self, other: &FilterModel) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for FilterModel

impl Eq for FilterModel

impl StructuralPartialEq for FilterModel