ALM Busy Circuits 出品的 Pip Filter 是一款寬度僅 4HP 的極簡化電壓控制 (Voltage Controlled) 2-Pole 低通濾波器 (Low Pass Filter),並內建了共振控制 (Resonance)、可觸發式「Ping」輸入以及整合式 VCA。這款模組專為節省 Eurorack 系統空間而設計,卻在音色塑造與動態控制上展現出令人驚豔的靈活性。
Pip Filter 的核心是一組溫暖且具備類比質感的濾波電路。使用者可以透過面板上的大型旋鈕手動調節 Cutoff 頻率,或利用雙 CV 輸入進行動態調變,其中一個輸入更配備了衰減倒相器 (Attenuverter),讓調變深度的控制更加精確。其 Resonance 旋鈕在推至極限時會進入自激振盪 (Self-oscillation) 狀態,並能粗略追蹤 V/Oct 訊號,使其能夠作為一個正弦波振盪器使用。
最獨特的功能之一是其「Ping」輸入。透過發送觸發訊號 (Trigger) 到 Ping 插孔,模組會內建一個短暫的衰減包絡來激勵濾波器,產生類似撥弦、打擊樂或充滿靈動感的電子音色,非常適合製作 Percussive Plucked Type Sounds。此外,模組後端內建了 VCA 電路,預設為開啟狀態 (Normalled Open),使用者可以透過特定的 CV 輸入進一步控制音訊的振幅,實現完整的動態修飾,而無需額外佔用其他 VCA 模組。
Pip Filter 結合了經典濾波器功能與現代節奏設計需求,是小型移動式機架 (Skiff) 或需要高密度功能模組的進階玩家首選。無論是細微的頻率衰減,還是激進的共振打擊樂音色,Pip Filter 都能輕鬆勝任。
寬度僅 4HP 的精巧設計,非常節省機架空間
具備 Resonance 控制的 2-Pole 低通濾波器
支持電壓控制 Cutoff,配備雙 CV 輸入與一組衰減倒相器 (Attenuverter)
共振控制可達到 Self-oscillation 狀態,並具備 V/Oct 追蹤能力
獨特的 Ping 觸發輸入,可快速製作撥弦與打擊感音色
內建整合式 VCA,支持獨立的振幅調變
適合用於音色修飾或作為獨立的 Percussive 聲源
英國設計與製造,品質穩定可靠
模組類型:Voltage Controlled Low Pass Filter and VCA
濾波斜率:2 Pole (12dB/Oct)
模組寬度:4HP
模組深度:32mm
供電需求:+12V: 25mA / -12V: 25mA
控制介面:Cutoff Knob, Resonance Knob, Attenuverter for CV
輸入插孔:Audio In, Cutoff CV In (x2), Ping In, VCA CV In
輸出插孔:Audio Out
尺寸:2.03 cm x 12.85 cm x 3.2 cm (寬 x 高 x 深)
重量:約 60g
內容物:ALM039 Pip Filter 模組、電源排線、掛載螺絲
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