AudioBuffer: Minor correction in documentation

modules/juce_audio_basics/buffers/juce_AudioSampleBuffer.h

@@ -877,7 +877,11 @@ public:
         @param numSamples           the number of samples to process
         @param startGain            the gain to apply to the first sample (this is multiplied with
                                     the source samples before they are added to this buffer)
-        @param endGain              the gain to apply to the final sample. The gain is linearly
+        @param endGain              The gain that would apply to the sample after the final sample.
+                                    The gain that applies to the final sample is
+                                    (numSamples - 1) / numSamples * (endGain - startGain). This
+                                    ensures a continuous ramp when supplying the same value in
+                                    endGain and startGain in subsequent blocks. The gain is linearly
                                     interpolated between the first and last samples.
     */
     void addFromWithRamp (int destChannel,
@@ -1043,7 +1047,11 @@ public:
         @param numSamples           the number of samples to process
         @param startGain            the gain to apply to the first sample (this is multiplied with
                                     the source samples before they are copied to this buffer)
-        @param endGain              the gain to apply to the final sample. The gain is linearly
+        @param endGain              The gain that would apply to the sample after the final sample.
+                                    The gain that applies to the final sample is
+                                    (numSamples - 1) / numSamples * (endGain - startGain). This
+                                    ensures a continuous ramp when supplying the same value in
+                                    endGain and startGain in subsequent blocks. The gain is linearly
                                     interpolated between the first and last samples.
 
         @see addFrom