# Programmable Sounds in Unity

**URL:** <https://qa.fmod.com/t/programmable-sounds-in-unity/13934>\
**Category:** Unity\
**Created:** [June 11, 2018, 3:28am UTC](https://qa.fmod.com/t/programmable-sounds-in-unity/13934 "2018-06-11T03:28:55Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![moontalker](https://avatars.discourse-cdn.com/v4/letter/m/4491bb/32.png) [@moontalker](https://qa.fmod.com/u/moontalker)\
**Post date:** [June 11, 2018, 3:28am UTC](https://qa.fmod.com/t/programmable-sounds-in-unity/13934/1 "2018-06-11T03:28:55Z")

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Hi,  
I’m having issue getting programmable sound to work in Unity with FMOD. I tried to create the FMOD sound from audioclip but it alway failed. I have provided the full source code for my test below.  
Thanks!

Source code:  
FMOD.Sound CreateSoundFromAudioClip(AudioClip clip, string name)  
{  
float[] samples = new float[clip.samples \* clip.channels];  
clip.GetData(samples, 0);

```
        FMOD.System lowlevel = FMODUnity.RuntimeManager.LowlevelSystem;

        uint lenbytes = (uint)(clip.samples * clip.channels * sizeof(float));

        FMOD.CREATESOUNDEXINFO soundinfo = new FMOD.CREATESOUNDEXINFO();
        soundinfo.length = lenbytes;
        soundinfo.format = FMOD.SOUND_FORMAT.PCMFLOAT;
        soundinfo.defaultfrequency = clip.frequency;
        soundinfo.numchannels = clip.channels;

        FMOD.RESULT result;
        FMOD.Sound sound;
        result = lowlevel.createSound("", FMOD.MODE.OPENUSER, ref soundinfo, out sound);

        IntPtr ptr1, ptr2;
        uint len1, len2;
        result = sound.@lock(0, lenbytes, out ptr1, out ptr2, out len1, out len2);
        Marshal.Copy(samples, 0, ptr1, (int)(len1 / sizeof(float)));
        if (len2 > 0)
        {
            Marshal.Copy(samples, (int)(len1 / sizeof(float)), ptr2, (int)(len2 / sizeof(float)));
        }
        result = sound.unlock(ptr1, ptr2, len1, len2);

        result = sound.setMode(FMOD.MODE.LOOP_NORMAL);

        result = lowlevel.playSound(sound, channelGroup, false, out channel);

        return sound;
    }

```

It’s return error: ArgumentNullException: Argument cannot be null.Parameter name: dest  
Marshal.Copy(samples, 0, ptr1, (int)(len1 / sizeof(float)));

---

<div class="post-metadata">

**Author:** ![cameron-fmod](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/cameron-fmod/32/261_2.png) [@cameron-fmod](https://qa.fmod.com/u/cameron-fmod)\
**Post date:** [June 14, 2018, 12:34am UTC](https://qa.fmod.com/t/programmable-sounds-in-unity/13934/2 "2018-06-14T00:34:48Z")

</div>

You also need to provide the soundinfo.cbsize  
soundinfo.cbsize = Marshal.SizeOf(soundinfo);

You should be checking the FMOD.Result after getting them back from a function, createSound is returning ‘invalid parameter’.

The log file, fmod.log, which is created next to the assets folder (also found in the menu FMOD\>Log Viewer) can sometimes contain more information on these errors.