amosc.alg

Audacity是一款用於錄音和編輯聲音的、免費的開放源碼軟體。它可以執行於Mac OS X、Microsoft Windows、GNU/Linux和其它作業系統

(AMOSC-ALG
(NAME "amosc")
(ARGUMENTS ("sound_type" "input") ("double" "step") ("rate_type" "sr")
           ("double" "hz") ("time_type" "t0") ("sound_type" "amod")
           ("double" "phase"))
(TABLE "input")
(NOT-IN-INNER-LOOP "input")
(START (MIN input))
(STATE 
       ("double" "ph_incr" "0")
       ("table_type" "the_table" "sound_to_table(input)")
       ("sample_type *" "table_ptr" "susp->the_table->samples")
       ("double" "table_len" "susp->the_table->length")
       ("double" "phase" "compute_phase(phase, step, (long) susp->table_len,
        input->sr, sr, hz, &susp->ph_incr)") )
(ALWAYS-SCALE amod)
(TERMINATE (MIN amod))
(LOGICAL-STOP (MIN amod))
(INNER-LOOP "
            long table_index = (long) phase;
            double x1 = (double) (table_ptr[table_index]);
            output = (sample_type) (x1 + (phase - table_index) * 
                          (table_ptr[table_index + 1] - x1)) * amod;
            phase += ph_incr;
            while (phase > table_len) phase -= table_len;
")
(CONSTANT "ph_incr" "table_len" "table_ptr" "the_table")

(SAMPLE-RATE "sr")
(FINALIZATION "    table_unref(susp->the_table);
")
)