Q:

Send audio over skype call

I'm trying to send an audio file (or directly audio over current input device for skype) when I click a button on a windows form.  I found some links but all references appear to be broken and I'm going mad on how to work with it. 
I already manage to connect to skype api and use it (I already use it for other projects and it's working well), but I really can't send any audio over input audio stream. 
Any suggestion will be appreciated. 
Current code: 
using System;
using System. Collections. Generic;
using System. Linq;
using System. Text;
using System. Windows;
using System. Windows. Controls;
using System. Windows. Data;
using System. Windows. Documents;
using System. Windows. Input;
using System. Windows. Media;
using System. Windows. Media. Imaging;
using System. Windows. Navigation;
using System. Windows. Shapes;
using System. Speech;
using System. Speech. Synthesis;
using SKYPE4COMLib;
using System. Reflection;
using System. IO;

namespace TestSendAudioOnSkype
{
    /// <summary>
    /// Logica di interazione per MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        private Call CurrentCall = null;
        private Skype SkypeApplet;
        private const int SkypeProtocol = 9;

        private SpeechSynthesizer Speak = new SpeechSynthesizer();

        public MainWindow()
        {
            InitializeComponent();
            try
            {
                SkypeApplet = new Skype();
                SkypeApplet. Attach(SkypeProtocol, true);
                SkypeApplet. CallStatus += SkypeApplet_CallStatus;
                //CurrentCall = SkypeApplet. ActiveCalls[0];
            }
            catch (Exception e)
            {
                MessageBox. Show("errore: " + e.ToString());
                System. Windows. Application. Current. Shutdown();
            }
        }

        void SkypeApplet_CallStatus(Call pCall, TCallStatus Status)
        {
            if (Status == TCallStatus.clsInProgress)
                CurrentCall = pCall;
        }

        private void button1_Click(object sender, RoutedEventArgs e)
        {
            if (CurrentCall == null)
            {
                CurrentCall = SkypeApplet. ActiveCalls[1];
            }

            string path = System. IO.Path. GetDirectoryName(Assembly. GetExecutingAssembly().Location);
            string filepath = System. IO.Path. Combine(path,"tmp.wav");
            Speak. SetOutputToWaveFile(filepath);
            Speak. Speak("Hello world");
            Speak. SetOutputToDefaultAudioDevice();
            //Speak. SpeakAsync("Hello world");

            try
            {
                CurrentCall.set_OutputDevice(TCallIoDeviceType.callIoDeviceTypeFile, filepath);
                CurrentCall.set_InputDevice(TCallIoDeviceType.callIoDeviceTypeFile, filepath);
                System. Threading. Thread. Sleep(3000);
                CurrentCall.set_InputDevice(TCallIoDeviceType.callIoDeviceTypeFile, "");
                CurrentCall.set_OutputDevice(TCallIoDeviceType.callIoDeviceTypeFile, "");
                MessageBox. Show("invio terminato");
            }
            catch (Exception exc)
            {
                MessageBox. Show("errore: " + exc. ToString());
                //System. Windows. Application. Current. Shutdown();
            }
        }
    }
}

What I've found so far: http://community.skype.com/t5/Desktop-API-former-Public-API/Sending-Audio-in-Skype/td-p/422

A:

Looks like the problem is about the file format, not directly my code which should work. 
This is what I got as an answer on skype forums: http://devforum.skype.com/t5/Developer-Corner/Skype4COM-and-C-Sending-audio-on-current-call-through-input/td-p/8414?utm_source=Subsciption&utm_medium=Subsciption&utm_campaign=Subsciption
It works, I built the file as a 16 Bit samples, 16khz, mono WAV file. 
Here is the code using System. Speech library: (Speak is a SpeechSynthesize object)
    Speak. SetOutputToWaveFile(filepath, new System. Speech. AudioFormat. SpeechAudioFormatInfo(
        16000,
        System. Speech. AudioFormat. AudioBitsPerSample. Sixteen,
        System. Speech. AudioFormat. AudioChannel. Mono
    ));

Hope this help

