📚 SPANDAN Bibliography & Academic References

📌 Living Document Disclaimer:
This bibliography is a dynamic reference index for Project SPANDAN (स्पंदन). It documents the foundational research papers, academic textbooks, and technical DSP manuals used across the software engine. This page will be explicitly updated with new literature references upon the inclusion of every new engineering chapter.

🗺️ Chapter-by-Chapter Source Mapping

🎵 Chapter 1: The Heartbeat of Sound – Numerically Controlled Oscillator (NCO)

• Pirkle, W. C. (2019). Designing Software Synthesizer Plug-Ins in C++: For AAX, AU, and VST3 with DSP Theory. Routledge / Focal Press.
  • Application: Numerically Controlled Oscillator (NCO) architecture, phase accumulator step-size calculations, and modulo-free wrap-around logic.
• Puckette, M. (2007). The Theory and Technique of Electronic Music. World Scientific.
  • Application: Discrete-time phase accumulation, trigonometric waveform mapping, and lookup-free digital sound synthesis.
• Välimäki, V. et al. (2006). Filter-Based Oscillator Algorithms for Virtual Analog Synthesis. IEEE Transactions on Audio, Speech, and Language Processing.
  • Application: Virtual Analog waveform generation and discrete bandlimited wave-shaping fundamentals.

⏳ Chapter 2: The Sculpture of Time – Analog-Modeled ADSR Envelopes

• Pirkle, W. C. (2019). Designing Software Synthesizer Plug-Ins in C++: For AAX, AU, and VST3 with DSP Theory. Routledge / Focal Press.
  • Application: Analog Moog-Ussachevsky RC circuit emulation, analog exponential time constants, and target overshoot math to prevent infinite asymptotic decay.
• Zölzer, U. (Ed.). (2011). DAFX: Digital Audio Effects (2nd ed.). John Wiley & Sons.
  • Application: Envelope follower mechanics, logarithmic volume perception, and transient de-clicking filter design.

🎛️ Chapter 3: The Architecture of Timbre – Dual-Oscillator Superposition & TPT State-Variable Filter

• Zavalishin, V. (2012). The Art of VA Filter Design (Ver. 2.1.2). Native Instruments.
  • Application: Topology-Preserving Transform (TPT), Bilinear Transform with frequency pre-warping, and Zero-Delay Feedback (ZDF) algebraic resolution in State Variable Filters (SVF).
• Zölzer, U. (Ed.). (2011). DAFX: Digital Audio Effects (2nd ed.). John Wiley & Sons.
  • Application: Multi-mode filter topologies, resonance peak modeling, and cents-based exponential detuning formulas.
• Bos, M. (2023). Rust Atomics and Locks: Low-Level Concurrent Programming in Action. O’Reilly Media.
  • Application: Lock-Free Single-Producer Single-Consumer (SPSC) Ring Buffers, memory ordering semantics, and thread safety between real-time audio threads and UI rendering threads.

🎹 Chapter 4: The Symphony of Concurrency – Polyphonic Voice Allocation & FM Synthesis

• Chowning, J. M. (1973). The Synthesis of Complex Audio Spectra by Means of Frequency Modulation. Journal of the Audio Engineering Society (JAES), 21(7), 526–534.
  • Application: Frequency Modulation (FM) synthesis mathematical foundation, carrier-modulator ratio calculation, and Bessel function sideband distribution.
• Pirkle, W. C. (2019). Designing Software Synthesizer Plug-Ins in C++: For AAX, AU, and VST3 with DSP Theory. Routledge / Focal Press.
  • Application: Polyphonic voice allocation state machines, JUCE Synthesiser / SynthesiserVoice integration, dynamic voice stealing algorithms, and 0 dBFS headroom management.

📈 Chapter 5: The Optics of Sound – Real-Time Radix-2 FFT & Lock-Free Visual Analytics

• Cooley, J. W., & Tukey, J. W. (1965). An Algorithm for the Machine Calculation of Complex Fourier Series. Mathematics of Computation, 19(90), 297–301.
  • Application: Cooley-Tukey Radix-2 Decimation-in-Time Fast Fourier Transform (FFT) algorithm for $\mathcal{O}(N \log_2 N)$ time-to-frequency domain conversion.
• Harris, F. J. (1978). On the Use of Windows for Harmonic Analysis with the Discrete Fourier Transform. Proceedings of the IEEE, 66(1), 51–83.
  • Application: Algorithmic windowing functions, Hann window energy conservation, and spectral leakage elimination in finite sample truncation.
• Bos, M. (2023). Rust Atomics and Locks: Low-Level Concurrent Programming in Action. O’Reilly Media.
  • Application: C++20 std::atomic memory ordering, Acquire-Release semantics, and Lock-Free Single-Producer Single-Consumer (SPSC) circular ring buffers.

📈 Supplementary & Advanced DSP Guides

• Zölzer, U. (Ed.). (2011). DAFX: Digital Audio Effects (2nd ed.). John Wiley & Sons.
  • Application: One-pole recursive filter design, exponential smoothing ($\alpha$-coefficient), and parameter interpolation for control-rate UI smoothing.

💻 C++ Systems Engineering & Real-Time Performance (Cross-Chapter)

• Meyers, S. (2014). Effective Modern C++: 42 Specific Ways to Improve Your Use of C++11 and C++14. O’Reilly Media.
  • Application: Real-time thread isolation, noexcept compiler optimizations, std::unique_ptr ownership, and zero-allocation memory constraints in processBlock().
• Stroustrup, B. (2013). The C++ Programming Language (4th ed.). Addison-Wesley.
  • Application: Deterministic object-oriented audio architecture, stack memory utilization, and RAII principles.

🔗 Official Publications & Reading Links